How did McKinley justify the annexation of the Philippines by the US?

President William McKinley justified the annexation of the Philippines by arguing that it was a moral obligation of the United States to civilize and Christianize the Filipino people. He believed that the U.S. had a responsibility to uplift and educate them, viewing the annexation as a way to promote democracy and stability in the region. McKinley also emphasized strategic interests, asserting that control over the Philippines would enhance American influence in Asia and provide a valuable base for trade and military operations.