Edward O Wilson, a world expert on ants, is a Harvard professor in his eighties, and this book, a sort of memoir, makes you want to be a scientist. “Science,” he tells us, “is the wellspring of modern civilisation.” When Wilson was 14 he was asked to be a “nature counselor” at a summer camp. Later, at university, he wanted to study flies but had to make do with ants — a lucky break, he says, because very few people knew much about them. To be a good scientist, he says, you don’t have to be a genius — imagination and persistence are the best qualities. His own IQ, he says, is 123.