Columbia subject headings:
Harvard subject headings:
Communism
Democracy
Liberalism
Marx, Karl, 1818-1883
Marx, Karl, 1818-1883--Political and social views.
Political science--Philosophy--History--19th century
Socialism
Tocqueville, Alexis de, 1805-1859
Tocqueville, Alexis de, 1805-1859--Political and social views.
Princeton subject headings:
Communism.
Democracy.
Liberalism.
Marx, Karl, 1818-1883.
Socialism.
Tocqueville, Alexis de, 1805-1859.