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Big stick ideology, big stick diplomacy, or big stick policy refers to President Theodore Roosevelt's foreign policy: "speak softly and carry a big stick; you will go far". Roosevelt described his style of foreign policy as "the exercise of intelligent forethought and of decisive action sufficiently far in advance of any likely crisis". As practiced by Roosevelt, big stick diplomacy had five components. First, it was essential to possess serious military capability that would force the adversary to pay close attention. At the time that meant a world-class navy; Roosevelt never had a large army at his disposal. The other qualities were to act justly toward other nations, never to bluff, to strike only when prepared to strike hard, and to be willing to allow the adversary to save face in defeat.
The idea is negotiating peacefully but also having strength in case things go wrong. Simultaneously threatening with the "big stick", or the military, ties in heavily with the idea of Realpolitik, which implies a pursuit of political power that resembles Machiavellian ideals. It is comparable to gunboat diplomacy, as used in international politics by the powers.