Chapter 21 Outline

Where Did We Come From?

  • Our closest living relatives
  • How humans differ from other apes
  • Our ancestry: Hominins through time

The Arrival of Homo sapiens

  • The human history of hybridization
  • The diversity of human populations

Brain and Language

Diet and Agriculture: A Revolution in Our World

Natural Selection, Past and Present

  • Our genetic loads
  • Natural selection and evolution in real time
  • Evolutionary mismatches