The United States was more based on self-interest at the start of the early 20th century, but became more driven on idealism at the end of the time period. Starting with William McKinley, America’s foreign policy began with the benefits for American commerce and imperialism, at the expense of nations like Cuba, Hawaii, and the Philippines. Theodore Roosevelt continued much of this scheme of self-interest with the Panama Canal and the Roosevelt Corollary, but started a few more idealistic trends in foreign relations with handling Japan and Russia. Finally, Woodrow Wilson began to lead the United States towards a more idealistic approach to foreign policy, with stopping dollar diplomacy, his relations with Mexico, and handling the start of World…