Columbia subject headings:
Antislavery movements--United States--History.
Conscientious objection--History.
Revolutions--History.
Social movements--History.
Harvard subject headings:
Antislavery movements--United States
Antislavery movements--United States--History.
Conscientious objection--Case studies.
Conscientious objection--History.
Revolutions
Revolutions--History
Social movements
Social movements--History
Princeton subject headings: