The richest 10% of Americans earn half of all of income. In Britain, the top 10% hold 40% of all the income. Inequality is not just an issue for rich countries. A billion people have been lifted out of poverty since 1990, and inequality has been rising in many other countries too. So, how much inequality is too much? Many may recoil from such a question - inequality is a dirty word. But this programme isn't about fairness. This programme is about economics – and how far inequality affects growth and prosperity. Presented by Linda Yueh.(Photo: A woman walks past a poor man. Credit: Getty Images)

The world has a problem. The climate is changing. At least, most people think so. That’s why global leaders have been meeting in Paris to work out a way to deal with the problem. They blame carbon dioxide in the atmosphere, much of it released by the human need for energy, obtained from fossil fuels like oil and coal. But believe it or not the world also has a solution at hand: sunlight. Harvest it where it shines brightest, in the Sahara Desert for example, and you have the ultimate get-out-of-jail-free card: a techno-fix to the mother of all problems. So, our question this week: why don't we solar panel the Sahara? Our contributors include: Gerhard Knies, a German physicist who has developed the idea; Tony Patt, who leads on this issue for the European Research Council; Daniel Egbe from the African Network for Solar Energy; and Helen Anne Curry, a technology historian, from Cambridge University in the UK. Presented by Michael Blastland(Photo: Sahara Desert. Credit: Getty Images)

The UN forecasts that the number of people living in Africa will double in the next 35 years. Nigeria, the fastest-growing nation, is expected to become the third-largest country in the world by 2050. By the end of the century, almost 40% of the world’s population will live on this one continent. It raises questions about how countries – some of which are already facing big challenges – will cope with twice the number of inhabitants in just one generation. There are fears about the impact a demographic explosion will have on health, society and the environment. But others say Africa’s population boom could turn out to be a good news story. How will a population boom change Africa? Ruth Alexander investigates.(Photo: Onitsha-Asaba Highway. Credit: Pius Utomi Ekpei/Getty Images)

Many claim that ‘Islamic State’ is the ideological offspring of Saudi Arabia; that the strict form of Islam originating in the Kingdom - and the Saudi state's aggressive promotion of it around the world – has fostered terrorism. Saudi Arabia is also accused of funding IS, either directly or by failing to prevent private citizens from sending money to the group. But what is the evidence for these claims? Our expert witnesses include: a former recruiter for Al Qaeda who explains what motivates jihadists; an Islamic law scholar who explains the little-understood beliefs of the so-called Islamic State; and a Saudi government official who says, far from aiding IS, his country is at the cutting edge of countering it.Presenter: Helena Merriman(Photo: Kingdom Tower in Riyadh. Credit to Shutterstock)

Imagine waking up one morning to the sound of a helicopter overhead. You look out and see that packages are being dropped in front of the homes of everyone on your street. You race downstairs, and tear open your package. Inside? Exactly $10,000 in new bills. A gift of freshly-printed money from your government – no strings attached. What would you do? Economists hope you would go out and spend – and that your spending would help kick start the post-industrial economies which many fear are grinding, inexorably, to a complete halt. We explore whether so-called “helicopter money” (more likely, money would simply be wired to your account) really is a solution to the problem of a low- or no-growth future. Our expert witnesses include: Adair Turner, the former head of Britain’s Financial Services Authority, who is prescribing just such economic medicine; Mohamed El-Erian, chairman of President Obama's Global Development Council; Professor Barry Eichengreen of Berkeley University in the United States and Richard Koo, formerly of the Federal Reserve Bank of New York and an economic advisor to successive Japanese governments. Presented by Linda Yueh.(Photo: Helicopter at G7, Credit: Getty Images)

In November the US Drug Enforcement Administration issued its Drug Threat Assessment. Mexican ‘transnational criminal organisations’, it said, are the primary suppliers of heroin, cocaine, methamphetamine, and marijuana to the United States. Drugs – the DEA says – are killing 46,000 Americans a year. But between Mexico’s criminal enterprises, and their clients, is a vast expanse of difficult geography and an international border. So, how do cartels get drugs into the US? The Inquiry hears from serving US law enforcement personnel tasked with intercepting drugs shipments. Their stories – of tunnels, “narco-subs” and complex criminal networks – are astonishing.(Photo: Narco-Submarines, Credit: Reuters)

We first asked this question over a year ago. So far, the answer has been no. The attacks in Paris killed 129 people. The day before that 43 people died when suicide bombers hit Beirut. Nearly two weeks before that a Russian passenger jet exploded over Egypt, killing all 224 people on board. The group calling itself Islamic State has claimed responsibility for all these attacks. If true, in two weeks, they have killed almost 400 civilians, in places way beyond the areas they control in Syria and Iraq. And they would have managed all that while being challenged on the ground by Kurdish fighters and bombed from the air, by coalition war planes, over 8,000 times. Can IS be defeated? We have gone back to the same expert witnesses we met the first time we asked the question. Now, over a year later, we want to know whether their answers have changed.(Photo: Female Kurdish soldier on the frontline against ISIL, Credit: Getty Images)

New research suggests plants might be capable of more than many of us might expect. Some – controversially – even describe plants as “intelligent”, or even “sentient”. So, this week, we’re asking: have we underestimated plants? Our expert witnesses include an academic studying how networks of trees communicate through what she describes as a “wood wide web”, and the pioneer who is using plants to develop robotics.(Photo: US-Fall-Shenandoah, Credit: Getty Images)

Syria’s cultural heritage is being attacked from all sides - the Assad regime, opportunistic looters, opposition forces, Islamic State fighters and even Russian air strikes. Ancient sites like Palmyra have been destroyed, and it is feared that hundreds of precious valuables have been smuggled out of the country to be sold on the international art market. Is it too late to save Syria’s antiquities? We speak to experts including the specialist trying to recover stolen items being sold on the global antiquities market, the volunteer organising a kind of archaeological resistance inside Syria, and the team reconstructing the country’s historic sites using technology. (Photo: Baalshamin detonation, Credit: AP)

Mohammed Akhlaq’s murder shocked India. A mob broke into his house last month and beat him to death. They believed a rumour that Mr Akhlaq, a Muslim, had broken a Hindu taboo by slaughtering a cow. We find out how the cow became such a political animal and look at whether Hindu nationalists are feeling bolder in today’s India. (Photo: An Indian woman sprinkles yoghurt paste onto a cow's forehead. Credit:Getty Images)

Rhinos are in trouble. The ancient Sumatran rhino has just been declared extinct in Malaysia, following the fate of black rhinos in West Africa in 2011. Central Africa's northern white rhino has been reduced to four - yes, four - animals, and conservationists say the more plentiful southern white rhinos are under unprecedented attack from poachers eager to sell the horns to Asian and Arab buyers. This week The Inquiry hears four very different answers to the question: How do you save the rhino? Experts include Namibia’s first female dangerous game professional hunter and one of China’s biggest celebrities and campaigner, Yao Ming.(Image: A baby rhino and an adult rhino. Credit: Getty Images)

Oil accounts for around 75% of Nigeria’s economy, but no-one knows how much the country produces or refines. It means corruption is rife. Hundreds of thousands of barrels of oil are stolen every day, at each level of the supply chain. It is a problem that has cost the Nigerian economy billions of dollars, and weakened its public services and infrastructure. Schools and hospitals are paid for, but never built; citizens are forced to pay bribes for basic services. Many believe Nigeria’s new president, Muhammadu Buhari, is the man to end this decades-old problem. He says he will do it, and has taken personal control of the oil ministry. But it is a huge task he has set himself. So, can Nigeria end oil corruption?(Photo: Buhari inauguration. Credit: AP)

Russia’s intervention in Syria caught the world by surprise. Moscow gave Washington just one hour’s notice before it began its aerial bombardment. Russia claims its jets are attacking the so-called Islamic State. But reports suggest the Russian pilots are in fact targeting groups linked to the Free Syrian Army - the main opposition to Syria’s President Assad, who is a Russian ally. It is the first time President Putin has deployed force beyond the borders of the former USSR and another dramatic step in his increasingly assertive foreign policy. But Josh Earnest, President Obama’s press secretary, has described Russia’s action as motivated by “weakness”. Is he right?Ambassador William Courtney of the Rand Corporation argues that the Middle East is the last place in the world where Russia can play a great power role, and that Syria is the last place in the Middle East where Russia can exert its power. Andrei Kolesnikov explains what he sees as Russia’s weaknesses; a weak economy, declining living standards and a working age population that is deteriorating.Dr Andrei Korolev disagrees. While international isolation and a faltering economy may have forced Russia to adapt, he says, it has done so in ways that make it stronger such as by forming a new alliance with China. The Hudson Institute’s Hannah Thoburn explains how a new politics is emerging. Russians are being asked to accept financial sacrifices in order to help return the country to its place as a global super power, and that so far its working. (Photo: President Putin at the UN General Assembly. Credit: Getty Images)

The CIA has just released 2,500 top secret presidential briefings from the 1960s. The President’s Daily Brief – or PDB – is the US intelligence agencies’ best assessment of global threats, delivered directly to the president every morning. The CIA’s director, John Brennan, has described the PDB as “among the most sensitive and classified documents in all of our government”. The decision to release some PDBs, even documents relating to events many decades ago, was not taken lightly. And, the briefings highlight an almost impossible dilemma – one still faced today by every Director of National Intelligence - what should, and should not, be said? The president cannot absorb everything - there has to be a choice. We explore the relationship between the intelligence, the advisers and the president. What does the president need to know?(Photo: President Lyndon B. Johnson (seated, foreground) working with (background L-R): Marvin Watson, J. Edgar Hoover, Sec. Robert McNamara, Gen. Harold Johnson, Joe Califano, Sec. of the Army Stanley Resor. Credit: LBJ Library)

The United States, UK, Israel and now Pakistan all use drone strikes to kill. In September a general in the Pakistani army announced their first ever use of an armed drone. It was directed at a terrorist compound, he said, and killed three. Meanwhile the US is thought to have launched a secret drone campaign to kill so-called Islamic State fighters in Syria. Armed drones are the counter-terrorism weapon of choice, capable of killing militants from a distance and without putting military personnel in harm’s way. But critics question how far they bolster wider attempts to defeat terrorism. So, do drone strikes work?(Photo: Reaper flies without pilot. Credit: Getty Images)

Japan is a pacifist country - at least that is what its constitution says. The wording, introduced under the occupying forces after World War Two, seems unequivocal: “the Japanese people forever renounce war as a sovereign right of the nation”. But new laws championed by conservative prime minister Shinzo Abe introduce a broader interpretation of what the constitution does, and does not, permit. Abe calls it “proactive pacifism”. Opponents say the laws are “war bills”, betraying the pacifism that has, for many, become central to Japanese national identity. There have been dramatic scenes in parliament with opposition MPs in tears. The majority of the public are opposed and people have taken to the streets in their tens of thousands. So is Japan abandoning pacifism? (Photo: Sumiteru Taniguchi. Credit: AP)

Tens of thousands of people have marched in Buenos Aires and elsewhere in outrage at the astonishing frequency with which women are being killed in Argentina - the vast majority at the hands of their partners or former partners. Violence directed at women and girls is at the extreme end of the scale. But the protesters believe it grows out of the 'machista' culture - where men have to be macho, and women have to do as they are told. In many ways, Argentina is not a special case - we could, perhaps, ask the same question of many nations. But this week The Inquiry is focusing on Argentina because the protests started an urgent debate inside the country about why women are seen as disposable. And, also because the most powerful office in the land is held by a woman - Cristina Fernandez de Kirchner - twice elected president. Why is this power not trickling down? Why is Argentina still so sexist?(Photo: Argentina Femicide Demo. Credit: Getty Images)

In 2011, following a devastating tsunami, Japan’s Fukushima nuclear power station went into meltdown, leaking radiation. It was the most serious nuclear accident since Chernobyl. It appeared to send the nuclear power industry into retreat – and not just in Japan. Other nations had second thoughts too. Germany decided to phase out its nuclear reactors altogether. But now Japan has resumed nuclear power generation. At the heart of the 'nuclear wobble' of 2011 is the question of risk. Attitudes to, and understanding of, risk vary surprisingly between nations and cultures. But after one of the most shocking incidents in nuclear power's history, will we be able to cope with our fears? In other words, can we learn to live with nuclear power? (Photo: A Czech Power plant. Credit: AP)

Tens of thousands of migrants continue to queue at the borders of the European Union in search of a better life. Their journeys are often hazardous and thousands have drowned in the Mediterranean trying to reach Italy or Greece. Attempts to share the burden among EU member states have been dogged by internal politics. And Europe’s actions so far have focussed on deterrence despite little evidence that such a strategy will work. So, in this week’s Inquiry, we’re asking what else Europe could try – and whether there are examples from other places, and other times, from which the EU’s leaders could learn. We look at the 1980s resettlement process in response to the Vietnamese “boat people” crisis; we examine Australia’s offshore processing of migrants; and we ask whether focussing on the “front line”, helping those countries migrants are leaving, is a realistic option.Presenter: Ruth Alexander(Photo: Young migrant at Psalidi on Kos, Credit: Press Association Wires)

Robots are coming for your job. Blue-collar jobs in industries like manufacturing have been disappearing for years but now white-collar work is under threat too. Machines are already taking roles that used to be done by journalists, lawyers and even anaesthetists. One recent study calculated that 47% of total employment in the US is at risk of automation in the next 20 years.So what will happen to all the human beings who did those jobs? Will we invent enough new jobs to keep them occupied? If not, how will they fill their time? And how will they earn money? The Inquiry – still made by humans, for now, – brings you answers.(Photo: A robot stands with workers at a Japanese employee supply company. Credit: Getty Images)

In June last year the world's attention became fixed on the progress of so-called Islamic State, or IS. They had just captured Mosul, Iraq's second-largest city. Since then a reported 20,000 fighters from all over the world have joined them. They have killed and enslaved thousands. They have captured towns, oil fields and dams. They control vast swathes of Iraq and Syria. IS are more brutal, sophisticated and enduring than anyone could have predicted. We test the argument that stopping IS will ultimately mean talking to them.(Photo: ISIS Propaganda image)

This July, it was reported that a woman from Washington State in the US had died of measles. It was the first measles death in the country in 12 years and comes after a huge spike in the number of cases of the disease. There is little doubt about what has caused the rise. The 'anti-vax' movement – activists who refuse vaccines believing them to be harmful to children – is vocal, vibrant and virulent. But with their claims proven time and again to be without any scientific basis, why are the 'anti-vaxxers' still going – and apparently growing?(Photo: Measles Cell. Credit: Shutterstock)

In 2009, UK Prime Minister Gordon Brown declared “the beginning of the end” for off-shore tax havens. Since then, the EU, the G20, President Obama and others have lined up to criticise them. And yet they arre still with us. Tim Whewell asks why tax havens continue to exist, and whether tax havens are really to blame for tax avoidance in the first place.(Photo: Island in the Seychelles. Credit: Shutterstock)

China's economy was up 150% until June. Then it fell by nearly a third. Now it has had the strongest two-day rise since the 2008 global crisis. China’s rollercoaster stock market has provoked panic in recent weeks; panic on the part of small investors, who looked on in horror as previous gains were wiped out, and panic – some would argue – on the part of the Chinese government, which did everything it could to stop the slide. Four expert witnesses analyse what these dramatic events tell us – not about the Chinese stock market, but about China itself.(Photo: An Investor walks past a stocks and shares board. Credit: Associated Press)

Streaming has transformed the way millions listen to music. Whether signed up to Spotify, Apple Music or others, music lovers can access tens of millions of tracks instantly and for the monthly cost of one CD. But is this spectacular transformation good for music? Though streaming surely helps artists find new audiences, do those artists get rewarded fairly? And has having a ‘global jukebox’ at our fingertips changed our relationship to music itself?(Photo: Lucy Rose)

The global effort to prevent athletes using performance-enhancing drugs is vast and sophisticated. You might think, in this era of advanced testing, it would be almost impossible to cheat and get away with it. But is that really the case? Alberto Salazar, one of the world’s most successful coaches, has been accused of encouraging his athletes to dope. Salazar strongly denies the allegations. But the story has reignited concerns that, despite the efforts of the anti-doping authorities, cheating is still too easy in elite sport. The Inquiry hears from someone who sets the rules, someone who tests the rules and someone who broke the rules to find out if the dopers or the testers are winning. (Photo: The starting line of an athletics track. Credit: Ben Stansall/Getty Images)

The global financial crisis reignited an old debate - is it better to cut spending and raise taxes in an economic downturn, or spend your way out of it? After a period of relative consensus up to 2010, some countries inclined more to austerity (cuts and tax rises), some against. In this edition of The Inquiry we examine whether we now have the evidence to settle this important economic argument.(Photo: Anti-austerity demonstration. Credit: Zak Kaczmarek/Getty Images)

Despite the tense and increasingly bitter negotiations between Greece and its European creditors - who the Greek government accuse of demanding intolerable austerity – most Greek people want their country to stay in the euro currency union. But there are some, including within the governing Syriza party, who think Greece might ultimately be better off going it alone, and returning to the drachma. There would be serious pain, no doubt. But, in the longer term, might Greece be better off out of the euro? (Photo: A man walks by a zero Euro graffiti.Credit: AFP/Getty Images)

Fifteen years ago, manned space flight was still a dream for China. Now, they are looking to the moon. They have mastered space walking, they are building advanced scientific satellites in partnership with the European Space Agency, and they are constructing their own ‘heavenly palace’ – a space station to rival the ISS. But some, not least the United States, are concerned by possible military uses for China’s blossoming space technology. This week our four expert witnesses help us figure out what China really wants from its space programme. (Photo: Chines flag billows with the moon in the background. Credit: Mark Ralston/Getty Images)

Shocking images have brought the Rohingya to the world’s attention - boatloads of people drifting aimlessly on the Indian ocean, sustained by bottles of water thrown to them by visiting journalists. The Rohingya are Muslims from western Myanmar – or Burma – who live a life of poverty and exclusion. The government refuses even to recognise their ethnicity. Hoping for better lives in Malaysia, they turned to people smugglers and leaky boats. Will anyone help the Rohingya, one of the most marginalised communities in the world? And, why has even the most famous living Burmese, the icon of democracy and Nobel Peace Prize laureate Aung San Suu Kyi, refused to speak up on their behalf?(Photo: Myanmar, South East Asia migrant. Credit: Ye Aung Thu/Getty Images)

Ask a scientist, and they will almost certainly tell you genetically modified food is safe to eat. Yet an awful lot of consumers disagree. Is their fear of GM food irrational? Earlier this year the Pew Foundation released a US poll which suggested 88% of scientists think GM food is generally safe to eat, while only 37% of the public agree. It is the issue on which American scientists and the general public are most divided, more so than climate change or vaccines. If the scientific consensus says it is safe, should we embrace a technology that could help solve hunger and feed the world? Or is GM food a lightning rod for justified concerns about the impact of global agribusiness and industrial food production?(Photo: Ripe wheat in a field. BBC copyright)

Fifa has been described as a “totalitarian” set-up “beyond ridicule” with a leadership “incapable of reform or cultural change”. A corruption report is said to have contained “numerous materially incomplete and erroneous representations”. Many have argued that world football’s governing body is badly in need of reform. So, as Fifa prepares to elect its next president, our question this week: who can fix FIfa? Sponsors and broadcasters provide the vast majority of the body’s income. Could they force change? Fifa relies on the support of regional organisations like Uefa to maintain its hold over world football. Could they put pressure on Fifa’s leadership? Or could the key be new laws in Switzerland, where Fifa is based? And what are the chances of change from within? Examining evidence from experts who know Fifa outside and in, The Inquiry has answers. Presenter: Helena Merriman. (Image:Member of the media wait next to a logo of the Worlds football governing body. Credit:MICHAEL BUHOLZER/AFP/Getty Images)

Recent high profile cases of unarmed black men dying at the hands of the US police have sparked outrage, protests and civil unrest in several American cities. The deaths of Michael Brown, Eric Garner, Walter Scott and Freddie Gray are – some claim – evidence of long-standing problems with police racism and excessive violence. But what do we really know about what’s happening? Our expert witnesses this week explain the issues of racism, bias and police use of force. And the head of President Obama’s taskforce on police reform, Charles Ramsey, tells us that fixing the problem will involve much more than just fixing the police.(Photo: Demonstration in St Louis, Missouri, following the shooting of Michael Brown. Credit: Scott Olson/Getty Images)

The violent riots on the streets of South Africa in recent weeks have seen foreigners killed, their shops looted and 5,000 left homeless. They are accused of taking jobs from locals in a country where high unemployment is a big concern - and an example of the gaping chasm that remains between rich and poor. So 21 years after Nelson Mandela pledged to liberate all South Africans from the continuing bondage of poverty and deprivation, why is South Africa one of the most unequal societies on the planet? (Photo: South African man waves a stick in the air, while demonstrators are chanting. Credit: Stefan Heunis/Getty Images)

Last month Nato ran a military exercise involving over 400 people from 16 countries. It was the most advanced ‘live-fire’ cyber-defence exercise ever carried out. The point of it all? To help Nato countries prepare for an all-out cyber attack. The former US Secretary of Defence, Leon Panetta, has said “there's a strong likelihood that the next Pearl Harbor could very well be a cyber attack that cripples our power system or our grid, our security systems, our financial systems, our governmental systems. This is a real possibility in today's world”. But how real is the threat of cyber warfare? Four expert witness help us separate fact from fiction.(Photo:Binary code cyber war. Credit: Profit_Image/Shutterstock)

In 2000 the world committed to reduce child mortality rates by 2015. At the time, there were on average 90 under-five deaths per 1,000 live births globally. Now there are 46. The UN says that means 17,000 fewer children are dying every day. Unicef has described the improvement as “one of the most significant achievements in human history”. But progress has been uneven. We look at one of the unexpected stars of the race to tackle child mortality – Rwanda – which, between 2000 and 2015, achieved the highest average annual reduction in the under-five mortality rate in the world. How did Rwanda do it? And could other nations follow its example?(Photo: Children Smiling Credit: Wlablack / Shutterstock)

In a matter of months rebels have swept through Yemen, capturing the capital, forcing the president into exile and causing hundreds of casualties as a simmering conflict has exploded into war. But the causes are complex and confusing. The Houthi rebels are from Yemen’s north, and are now laying siege to the southern port of Aden. Are these geographical rivalries the key? The Houthi are Shia Muslims, supported by Iran. The rest of Yemen is mostly Sunni Muslim, and Saudi Arabia is leading a bombing campaign against the Houthi forces. So is this a sectarian conflict, or even a regional proxy war? And the Houthis have allied with former President Saleh, against Yemen’s current leader who replaced him in the transition after Yemen’s 2011 revolution. Are the roots of the current conflict in the failure of that revolution to deliver progress? Four expert witnesses help to disentangle this complex web and explain what the conflict in Yemen is really about.(Photo: Houthi supporters demonstrate against recent UNSC sanctions. Credit: Yahya Arhab/European Photopress Agency)

Later this month 190 nations will meet in New York to discuss the nuclear Non-Proliferation Treaty (NPT), 45 years after it came into force. The Treaty prompted several aspiring nuclear-weapon nations to give up trying to get the bomb, but it also committed nuclear-weapon states like Russia and the US to pursue disarmament. Progress has been made. Overall stocks of nuclear warheads have dropped significantly. But is that the whole story? Both the US and Russia have committed huge sums – over a long timescale – to modernise their arsenals. One expert tells The Inquiry that these modernisation programmes amount to a new nuclear arms race - one which is creating a new generation of less powerful but more accurate weapons. Some argue that such ‘tactical’ weapons are more likely to be used. Another expert witness tells us that the failure of nuclear-weapon states to disarm threatens the NPT itself. And we hear disturbing testimony about the nuclear stand-off between India and Pakistan and a terrifying account of a largely forgotten incident in 1995 when the world came within two minutes of nuclear annihilation.(Photo: Explosion nuclear bomb in ocean. Credit: Romolo Tavani/Shutterstock)

Ahead of a historic meeting between Cuba’s President Castro and US President Obama, The Inquiry asks if the island nation’s warmer relations with America are a betrayal of its revolutionary past. More than half a century ago, Che Guevara became a global icon after he fought alongside Fidel and Raul Castro to overthrow an American-backed government and put into practice their socialist ideals. Now Raul Castro has made a deal with the Americans and the lifting of the long-standing economic embargo of Cuba is becoming a realistic prospect. We delve into Che Guevara’s past, the changes already happening in Cuba under Raul Castro and the Obama administration’s motives, to answer the question - what would Che say?(Photo: Fidel Castro and Che Guevara in the mid 1950s. Credit: Getty Images)

It seems something is missing from newspapers and TV bulletins - climate change. A story which dominated the news five years ago has dropped steadily down the agenda. One study has found coverage has dropped 36% globally in that time. Why? On The Inquiry this week we hear a tale of chronic political fatigue. We ask whether our hunter-gatherer brains simply aren't wired to think long-term. And we find out why climate change has all the hallmarks of a story likely to make newspaper editors groan. It could be – as one of our expert witnesses tells us – time to "change the narrative".(Image: A man places his hand on the parched soil. Credit: Press Association)

Who has authority in Tibet? Many Tibetans revere the Dalai Lama and support his goal of greater autonomy from Beijing. But officials there hold the opposite view. For them, he is a villainous traitor. Both sides agree that the role of Dalai Lama has been filled for centuries through reincarnation. The current one will turn 80 this year and Beijing is keen to control the process of finding his reincarnation. But he has said that the role will one day end. Better to have no Dalai Lama than “a stupid one,” he said. His comments sparked a furious reaction from Beijing this month. So, will the Dalai Lama reincarnate? Guests include a spokesman for His Holiness and a Chinese analyst in Beijing.

Forty-four years after President Nixon declared “war on drugs”, four US states have now agreed to legalise the sale of marijuana and a majority of Americans supports legalisation. Across the world, drug laws are being relaxed, from Uruguay to Portugal to Jamaica to the Czech Republic. Does this global trend mean the war on drugs has been lost? The Inquiry hears from expert witnesses including an ex-president and a former prosecutor who now defends drug traffickers.(Photo: A person rolling a joint of cannabis. Credit: Press Association)

The beheading of 21 Egyptian Christians on a Libyan beach has exposed the lawlessness of the country ruled by Colonel Gaddafi until 2011. The internationally-recognised government is trying, without much success, to run the country from the eastern city of Tobruk. In Tripoli, another body claims to be the legitimate government. But is the real power struggle between the militias associated with each group – and where does the so-called Islamic State fit in? With neighbours near and far getting involved to push their own agendas, we investigates the forces operating in Libya and what they want. (Image: A Libyan man waves his national flag. Credit: Abdullah Doma/AFP/Getty Images)

The murder and disfigurement of a 20-year-old woman in southern Turkey has prompted nationwide protests. Demonstrators have chanted the victim’s name, Ozgecan Aslan, and claimed that Turkey is becoming increasingly misogynistic. They point to growing reports of violence against women and restricted access to abortion. Hundreds of thousands of women have tweeted #sendeandat – 'tell your story' in Turkish - to share their experiences of abuse. The powerful president, Recep Tayyip Erdoğan, says that violence against women is the “bleeding wound” of Turkey. But he has also said that women are “not equal” to men. So, is it life getting worse for woman in Turkey? Expert witnesses include a leading Turkish feminist and a member of the governing AK party.(Image: People hold posters of Ozgecan Aslan. Credit: Adem Altan/AFP/Getty Images)

More than 3,000 people are estimated to have died in the Mediterranean Sea last year. The Pope has warned that the waters are in danger of becoming "a vast cemetery". So what could European countries do to stop these deaths? The Inquiry hears evidence about the people smugglers described as the most ruthless travel agents on the planet, the Italian Navy rescue mission that’s been dramatically down-sized, and the claims that saving migrants at sea creates a "pull factor".Presenter: Neal Razzell(Image: The coffins of immigrants who died trying to reach the Italian coast arrive from Lampedusa to Porto Empedocle, 11 February 2015. Credit: MARCELLO PATERNOSTRO/AFP/Getty Images)

War in Ukraine and the threat of conflict in the Baltics raise fundamental questions about the West’s military alliance. What is NATO for? And is it up to the job? More countries have been joining the club, but those who foot the bill seem to be becoming less keen to do so. Do would-be aggressors still believe that an attack on one NATO member would be treated as an attack on all? Our witnesses include a former senior commander and the man who, until a few months ago, led the alliance.(Photo: Romanian army soldiers from the guard regiment hold NATO membership countries' flags at NATO flag raising ceremony in Bucharest, 2004. Credit: Daniel Mihailescu/AFP/Getty Images)

79-year-old King Salman has taken the Saudi throne, promising security and stability. But what do his past and his first acts as king tell us about how the country might change under his rule and beyond? Our Inquiry hears from a newspaper editor and an ex-spy who have both met him and from Saudis who hope for change.Presenter: Helena MerrimanPhoto: New Saudi King Salman attends a ceremony following the death of the late Saudi King at the Diwan royal palace in Riyadh (Credit: Reuters)

Most of the nearly 300 girls kidnapped from a school in northern Nigeria last year are still missing. Their plight temporarily brought global focus to a hideous insurgency that seems to produce new horrors every day. More than 17,000 people have died and a million have been displaced in the Nigerian army’s six-year fight with Boko Haram. The army has been rocked by mutinies – including in the division created to fight the militants - and soldiers in other parts of the country have been dismissed for refusing orders to fight in the north. Meanwhile, human rights groups say the army can be nearly as brutal to civilians as the militants are. And in a sign of apparent growing impatience, Nigeria's neighbours have begun sending their own armies against Boko Haram. So this week we ask, Is the Nigerian Army Failing? (Photo: Some of the 59 Nigerian soldiers facing trial on charges of mutiny and conspiracy to commit mutiny over claims that they refused to fight Boko Haram militants sit handcuffed on October 15, 2014 in the military courtroom in Abuja. The soldiers, all members of the 111th Special Forces Battalion, all pleaded not guilty in court. They are also accused of refusing to deploy in August to recapture the towns of Yelwa, Bellabulini and Dambo in Borno state from Boko Haram, according to the charge sheet. Credit: AFP/Getty Images)

After the recent high-profile spat with the US over The Interview – a Hollywood film that mocks North Korea’s enigmatic leader – what do we know about his ambitions? Our expert witnesses include the first Western journalist to open an office in Pyongyang, a businessman who trains North Koreans and an admirer of Kim Jong Un who says he will succeed where his father and grandfather failed.(Photo: Kim Jong Un. Credit: Associated Press)