Eighty years ago Ian Suttie, a Scottish psychiatrist, wrote The Origins of Love and Hate, in which he fiercely criticized Freud’s theories. Freud saw human beings as ‘isolates wrestling with their instincts’, Suttie saw them as dreading isolation, ‘striving from the first to relate to [the] mother, and [their] future mental health turning on the success or failure of this first relationship’. Love was social rather than sexual in its biological function, thought Suttie, and was derived from a ‘self-preservation instinct rather than the genital appetite’.