Columbia subject headings:
Pacifists--Biography--Congresses.
Philosophers--Congresses.
Political science--Philosophy--Biography--Congresses.
Harvard subject headings:
Pacifists--Biography--Congresses.
Peace (Philosophy)--Congresses.
Philosophers--Biography--Congresses.
Political science--Philosophy--Congresses
Princeton subject headings:
Pacifists--Biography--Congresses.
Political science--Philosophy--Biography--Congresses.