Sara Wheeler finds writing a biography to be a humanising process, in which learning to see the world through someone else's eyes is more important than rushing to judge them.

'We are quick to judge - quicker than ever in grotesquely polarised times. But if we can't know another person, how can we judge them?', she writes.

'I am suggesting that we use the biographer's craft as a tool for understanding. And a tool for avoiding generalisation, compartmentalisation and judgement.'

Producer: Sheila Cook