Signing off from Comedy Central’s The Daily Show in August 2015, Jon Stewart delivered a powerful soliloquy about the “bullshit-ocracy”. He finished: “I say to you tonight, friends, the best defense against bullshit is vigilance. So, if you smell something, say something.” A year and three months later, Donald Trump was elected US president. Earlier this month Stewart’s successor, Trevor Noah, delivered his own final monologue as he departed the show. “I always tell people: if you truly want to learn about America, talk to Black women,” he said, his eyes clouding. “Because unlike everybody else, Black women cannot afford...