Caleb Azumah Nelson on why anger is no longer a stranger to him, but a friend.

He talks of a childhood in which he tried to navigate a world which was 'already coding a young black man as dangerous, threatening. Angry.'

'As I've grown older,' writes Caleb, 'the question is not whether I should be angry, but do I love myself enough to be angry, to object when I feel wronged or faced with injustice.'

Producer: Adele Armstrong Sound: Peter Bosher: Production coordinator: Gemma Ashman Editor: Richard Fenton-Smith