Columbia subject headings:
National characteristics, American.
Social values--United States.
Sociology--United States.
United States--Politics and government--Philosophy.
United States--Social conditions--1980-2020.
Harvard subject headings:
National characteristics, American
National characteristics, American.
Social values--United States
Sociology--United States
United States--Politics and government--Philosophy.
United States--Social conditions--1980-2020
Princeton subject headings:
National characteristics, American.
Social values--United States.
Sociology--United States.
United States--Politics and government--Philosophy.
United States--Social conditions--1980-2020.