The document discusses demographic changes in American society from 1990 to 2020 based on data from the U.S. Census Bureau. It outlines four generations currently in the workforce: Traditionalists born 1932-1945, Baby Boomers born 1946-1965, Generation X born 1965-1978, and Millennials born 1979-1998. The document provides population distribution data by age and sex for each decade, and notes how the generations differ in their attitudes towards work, leadership, communication, and adapting to change.