Columbia subject headings:
Harvard subject headings:
Pacifism--Psychological aspects.
Political violence--20th century.
Violence--Psychological aspects
World War, 1914-1918
World War, 1914-1918--Desertions--Psychological aspects.
World War, 1914-1918--Psychological aspects
World politics--20th century
Princeton subject headings:
Pacifism--Psychological aspects.
Violence--Psychological aspects.
World War, 1914-1918--Desertions--Psychological aspects.
World War, 1914-1918--Psychological aspects.