How did the conferences intended primarily to work toward ending world war 2 also to seek to prevent a Third World War?

Conferences held during and after World War II, such as the Yalta and Potsdam Conferences, aimed to establish a framework for post-war peace and security, addressing the geopolitical tensions that could lead to a Third World War. Leaders discussed the restructuring of Europe, the establishment of the United Nations, and the principles of collective security to promote cooperation among nations. By fostering dialogue and creating institutions for conflict resolution, these conferences sought to prevent future global conflicts and ensure a stable international order.