Acceptance of violence as a tool for happiness - Jules Michelet

 The historian Jules Michelet later argued that the death of the former king led to the acceptance of violence as a tool for happiness. He said, "If we accept the proposition that one person can be sacrificed for the happiness of the many, it will soon be demonstrated that two or three or more could also be sacrificed for the happiness of the many. Little by little, we will find reasons for sacrificing the many for the happiness of the many, and we will think it was a bargain."

https://en.wikipedia.org/wiki/Louis_XVI