Over the course of the 20th century, genes began to play a greater role in the height and body mass index (BMI) of Americans, while their significance decreased in educational attainment and occurrence of heart disease.
The findings, from research by Princeton sociologist Dalton Conley and colleagues, shed new light on how the genetic and environmental landscape of American society has changed over the past century, and highlight the power of combining new genetic tools with traditional social science research.
