In apartheid South Africa, ‘the enemy’ was ever present, day and night, from the public toilets you couldn’t use to the neighbourhood you couldn’t live in, by way of police raids at first light to check on your bedfellows, or simply to keep you terrified. When Winnie Madikizela-Mandela – who died on 2 April at the age of 81 – spoke of ‘the enemy’, the words had an intimate ring.