Michael Varnum explains new research on the role ecological factors play in the differences between cultures. Listen to The Conversation Weekly podcast.
People with a common history – often due to significant geographic or social barriers – often share genetics and language. New research finds that even a dialect can act as a barrier within a group.
A number of theories try to explain how cultural differences come to be. A new study quantifies how such factors as resource abundance, population density and infectious disease risk can contribute.