Genes: Our Codes for Life
Twin and Adoption Studies
Temperament and Heredity
Heritability
Gene-Environment Interaction
The New Frontier: Molecular Genetics
Natural Selection and Adaptation
Evolutionary Success Helps Explain Similarities
An Evolutionary Explanation of Human Sexuality
Parents and Early Experiences
Peer Influence
Variation Across Cultures
Variation Over Time
Culture and the Self
Culture and Child-Rearing
Developmental Similarities Across Groups
Gender Similarities and Differences
The Nature of Gender
The Nurture of Gender