Are the differences between men and women innate and biologically defined, or learned through socialisation? This is the question at the core of the Harvard professor Carole Hooven’s study of testosterone. Her answer – that the science inarguably shows that the hormone divides the sexes and has a major impact on behaviour – is compelling. Testosterone draws together the evidence of animal experiments, behavioural endocrinology, “artificial experiments”, and natural conditions to show how the hormone shapes aggression, sex, childhood play, sporting abilities, gender transition and more.
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