The neuroscientist talks about combating insomnia, going up against Big Pharma — and why night owls shouldn’t feel guilty

The actress’s clean-living empire divides opinion. She talks about Goop’s controversies — and why it’s ‘bullshit’ that wellness is for rich people

America’s youngest billionaire on Snapchat’s future and why he limits his kids’ screen time

‘Anyone asking me for PR advice would need their head examined’

The 86-year-old talks about her years in hiding on a farm, the rise of the far-right — and building a new temple in Munich

The Socialist politician on Macron’s mis-steps, her country’s malaise — and why the men who rule France should have listened to her

Over Bellinis in New York, the outsider of American art talks about screaming patrons, making masterpieces and not fitting in

The UN lawyer on running the Rwandan and Yugoslav tribunals, rethinking the refugee crisis and why clarity matters more than courage

The first man to walk to both poles and climb Mt Everest talks about the value of silence and why endurance is all in the mind

The actor on her latest stage epic, the refugee crisis — and why she doesn’t much like going to the theatre

The veteran financier on the Big Bang, banking’s boomtime and the scandals that scuppered his peerage

The former Federal Reserve chair warns that presidential attacks on her successor ‘undermine stability’

Apple’s chief design officer on Steve Jobs, the $5bn new campus — and why the unforeseen consequences of tech keep him awake

Fourteen years after his failed bid for the White House, is the former secretary of state gearing up for another attempt?

City campaigner on juggling work and family and the battle for diversity

The man who spent 20 years making mega-deals and enemies on feuds, A-listers and why ‘vulnerability was a sin’

The patriarch on Macron’s time at Rothschild, almost merging with Lehman — and why he’s inspired by the coach of Les Bleus

The activist on the occupation, balancing teenage life and politics — and the slap that landed her in prison

The cellist talks about humility, mid-gig aerobics and whether he would play for Trump

The activist on Brexit, Labour party power struggles and anti-Semitism on the left

The original ‘enfant terrible’ of French fashion on why his teddy bear is his ultimate muse

The White House and Wall St powerbroker on race, his friends the Clintons and being a Beltway insider

Japan’s most popular PM on Elvis Presley, nuclear power — and why he doesn’t regret his support for the Iraq invasion

Chairman of the biggest independent oil trader talks about the art of living dangerously