‘It’s a new world. It’s a little fascistic. And it needs a different response’: U2 on 50 years together – and their undimmed faith in humanity

After some so-so albums, can U2’s new one, Carnaval de Luz, restore them to glory? They discuss male egos, working with Dolly Parton, and explain why, despite Trump, they still believe in democracy – at least in their band La Petite Maison, in Nice, has a certain reputation as a five-star celebrity haunt. Beyoncé eats here. So do Elton John, Tom Cruise, Harry Styles and Leonardo DiCaprio, their…