I think he assisted in developing NATO, which helped Western Europe rebuild after the war. He created the Marshall Plan, which provided economic support for war-torn regions. He helped stop the spread of communism in Western Europe.
He is referred to as the "Father of the Nation" in the Republic of China due to his role in the overthrow of the Qing dynasty during the Xinhai Revolution.
Sun remains a unique figure among 20th-century Chinese leaders for being widely revered in both mainland China and Taiwan.
