How was the roosevelt corollary to the monroe doctrine a radical change in american foreign policy

For the first time, the United States would police disputes between Latin American and European governments.

- "a new era of american politics began with jackson's election in 1828, but it also completed a grand social experiment begun by the american revolution. nevertheless, jacksonian democracy represented a provocative blending of the best and worst qualities of american society."

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food and resources were plentiful.

women were encouraged to marry later in life so they could work in factories.