What policy that sought peace and stability by satisfying the reasonable demands of dissatisfied powers?

The policy that aimed to achieve peace and stability by addressing the reasonable demands of dissatisfied powers is known as "appeasement." This approach was notably applied by European leaders in the 1930s, particularly towards Nazi Germany, as they sought to avoid conflict by conceding to some of Hitler's territorial ambitions. The most famous instance of appeasement was the Munich Agreement of 1938, where Britain and France allowed Germany to annex the Sudetenland in Czechoslovakia in hopes of preventing a larger war. Ultimately, this policy is often criticized for failing to prevent World War II, as it emboldened aggressive powers instead of fostering lasting peace.