 In the first part of the book, "'Half Changed World', Half Changed Minds", Fine argues that social and environmental factors strongly influence the mind, challenging a 'biology as fallback' view that, since society is equal now for the sexes, persistent inequalities must be due to biology.She also discusses the history and impact of gender stereotypes and the ways that science has been used to justify sexism.In the second part of the book, "Neurosexism", Fine criticizes the current available arguments and studies supporting sex differences in the mind, focusing on methodological weaknesses and implicit assumptions.