Columbia subject headings:
Social change.
United States--Economic conditions--To 1865.
United States--Politics and government--19th century.
United States--Social conditions--To 1865.
Harvard subject headings:
Social change.
United States--Economic conditions--To 1865.
United States--Politics and government--19th century.
United States--Social conditions--To 1865.
Princeton subject headings:
Social change.
United States--Economic conditions--To 1865.
United States--Politics and government--19th century.
United States--Social conditions--To 1865.