Columbia subject headings:
Political violence--Europe--History.
Punishment--Europe--Philosophy--History.
State, The--Philosophy.
Violence (Law)--Europe.
Harvard subject headings:
Security sector.
Social sciences--Philosophy
Social service.
Terrorism.
Violence
Princeton subject headings:
Political violence--Europe--History.
Punishment--Europe--Philosophy--History.
State, The--Philosophy.
Violence (Law)--Europe.