A term outlining the philosophy of appeasement, in which supporters argue that peace is worth the cost asked by an enemy. It was once used as a positive term, but became an attack on appeasement after World War II.
Peace at any price is often linked with former British Prime Minister Neville Chamberlain, who is famous for attempting to appease Nazi Germany before WWII. He signed the Munich Pact, which gave Czechoslovakia to the Nazis. The failure of Chamberlain’s attempt for peace, combined with the cost of an entire nation in that attempt, turned “peace at any price” into an attack on appeasement.
It is also sometimes referred to as “peace at any cost.”