1902-1979. US sociologist, who attempted to integrate all the social sciences into a science of human action. He was professor of sociology at Harvard University from 1931 until his death, and author of over 150 books and articles. His theory of structural functionalism dominated US sociology from the 1940s to the 1960s, and as an attempt to explain social order and individual behaviour, it was a major step in establishing sociology as an academic and scientific discipline.