Why did Western leaders pursue a policy of appeasing Germany?

Western countries believed that this is the most correct decision. The world had not yet departed after the First World War, so it was logical that countries did not want to get involved in bloody battles again. They made concessions to Germany, and she received more and more power and opportunities to implement her own plans. As practice has shown, the policy of appeasement did not work for Germany and in 1939 the Second World War began.