The "American system" proposed by Henry Clay was a plan to:

The American system was a national economic plan put forth by Senator Henry Clay of Kentucky and the Whig party throughout the first half of the 19thcentury. The plan consisted of three major components:

Pass high tariffs (taxes) on imports to protect American businesses and to increase revenues.

Re-establish a Bank of the United States (original charter had expired in 1811) in order to stabilize US currency and state banks.

Develop and support internal capital improvements, primarily consisting of designing and constructing roads and canals.

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disease was the number one killer of native peoples. they had had little exposure to the diseases of europe. this led to some villages being almost completely wiped out and some tribes destroyed.