Columbia subject headings:
Civil rights and socialism.
Civil rights.
Marx, Karl, 1818-1883.
Rousseau, Jean-Jacques, 1712-1778.
Harvard subject headings:
Civil rights and socialism.
Civil rights.
Liberty.
Marx, Karl, 1818-1883
Philosophy, Marxist.
Rousseau, Jean-Jacques, 1712-1778
Princeton subject headings: