A Bull, of course, is a mafia enforcer. By a strange twist of fate Bulle just-so-happens to be German slang for a policeman.
Hedley Bull, a famous realist thinker, wrote a book called “The Anarchical Society”.
BULLE ciphertext
FUASF cipher
WALTZ plaintext
Kenneth Waltz, also a realist, was author of “Man The State and War”.
Both books are excellent, worth reading, though
F.ully
U.nderstood
A.re
S.omewhat
F.lawed