Why did president Theodore roosevelt help negotiate peace between japan and russia?

President Theodore Roosevelt helped negotiate peace between Japan and Russia primarily to end the Russo-Japanese War (1904-1905) and to stabilize East Asia. He recognized that prolonged conflict could lead to greater instability in the region and potentially threaten American interests. By facilitating the Treaty of Portsmouth in 1905, Roosevelt aimed to assert the U.S. as a key diplomatic player and promote peace, which earned him the Nobel Peace Prize in 1906. This intervention also reflected his broader strategy of using diplomacy to manage international relations and enhance American influence globally.