Sir John W. Salmond, Jurisprudence (1913)
“ The instrument of coercion employed by any regulative system is called a sanction, and any rule of right supported by such means is said to be sanctioned. Thus physical force, in the various methods of its application, is the sanction 12applied by the state in the administration of justice. Censure, ridicule, contempt, are the sanctions by which society (as opposed to the state) enforces the rules of morality. War is the last and the most formidable of the sanctions which in the society of nations maintain the law of nations. ”
