“When Adam Smith, extolling the power of the market, noted that, ‘it is not from the benevolence of the butcher, the brewer, or the baker that we expect our dinner’, he forgot to mention the benevolence of his mother, Margaret Douglas, who had raised her boy alone from birth. Smith never married so had no wife to rely upon (nor children of his own to raise). At the age of 43, as he began to write his opus, The Wealth of Nations, he moved back in with his cherished old mum, from whom he could expect his dinner every day. But her role in it all never got a mention in his economic theory, and it subsequently remained invisible for centuries.”