In the England of my childhood, greengrocers were heavily reliant on South African farmers. This was still the case when I started reading newspapers and discovered that not all the world was as equitable as my little corner of it. By that time, many of those greengrocers had been displaced by supermarkets, which made it much easier for my friends and I to do our bit for regime change, spending many hours each weekends attaching ‘There is no goodness in the fruit of apartheid’ stickers to the apples in Sainsbury’s.