in American history, policy popularized and named by Theodore Roosevelt (Roosevelt, Theodore) that asserted U.S. domination when such dominance was considered the moral imperative.

Roosevelt's first noted public use of the phrase occurred when he advocated before Congress increasing naval preparation to support the nation's diplomatic objectives. Earlier, in a letter to a friend, while he was still the governor of New York, Roosevelt cited his fondness for a West African proverb, “Speak softly and carry a big stick; you will go far.” The phrase was also used later by Roosevelt to explain his relations with domestic political leaders and his approach to such issues as the regulation of monopolies and the demands of trade unions. The phrase came to be automatically associated with Roosevelt and was frequently used by the press, especially in cartoons, to refer particularly to his foreign policy; in Latin America and the Caribbean, he enacted the Big Stick Policy (in foreign policy, also known as the Roosevelt Corollary to the Monroe Doctrine) to police the small debtor nations that had unstable governments.