" We’ll have to reason with them.” “Are you serious?” “Spread love and understanding,” Reacher said. “Use force if necessary.” “Who said that?” “Leon Trotsky, I think.” “He was stabbed to death with an ice pick. In Mexico.” “That doesn’t invalidate his overall position. Not in and of itself.” “What was his overall position?” “Solid. He also said, if you can’t acquaint an opponent with reason, you must acquaint his head with the sidewalk. He was a man of sound instincts. In his private life, I mean. Apart from getting stabbed to death with an ice pick in Mexico, that is. "

― Lee Child , Never Go Back (Jack Reacher, #18)