"Gender is a social construct." A framework for thinking about sex differences
Sex differences in personality
Sex differences in neurocognitive functioning
Sex differences in educational and vocational choices
Sex differences in the brain
"Race is a social construct." A framework for thinking about race differences
Genetic distinctiveness among ancestral populations
Evolution since humans left Africa
The landscape of ancestral population differences
"Class is a function of privilege." A framework for thinking about heritability and class
The ubiquity of heritability and the small role of the shared environment
Abilities, personality, and success
Constraints and potentials
Looking ahead. The shape of the revolution
Reflections and speculations.