What motivational factor played a key role in the issuance of the monroe doctrine?

The United States wanted to make sure that the European countries will not attack the United States. The doctrine stated that the US will remain neutral in any foreign affairs. If any European countries will try to colonize the US, they will consider it as an attack and may declare war against the country involved.

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question - in the 1900s there were two competing views about the environment that often pitted industrialist and conservationist against one another. how were these two competing views demonstrated by the environmental policies of president roosevelt and president taft?

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