what are the seeds of this doctrine?
The first asserts that the New World is no longer subject to colonization by the European countries and the second clarifies that the U.S. remains neutral on existing European colonies in the Americas but is opposed to "interpositions" that would create new colonies among the newly independent Spanish American republics.
Monroe Doctrine
The first is the introductory statement, which asserts that the New World is no longer subject to colonization by the European countries:

The second key passage, which contains a fuller statement of the Doctrine, is addressed to the "allied powers" of Europe; it clarifies that the U.S. remains neutral on existing European colonies in the Americas but is opposed to "interpositions" that would create new colonies among the newly independent Spanish American republics:
what military hero from the mexican war became potus Zachary Taylor. who is this person? He was the 12th president of the United States. did he serve in the military? Yes, he was a career officer in the United States Army, rose to the rank of major general. where was he born? Orange County, Virginia. where is this country located? UNANSWERABLE what is the geography of this country? UNANSWERABLE where is the aforementioned county located? In the Central Piedmont region of the Commonwealth of Virginia. what was the role of the person (mentioned in the beginning) during the war of 1812? He successfully defended Fort Harrison in Indiana Territory from an Indian attack commanded by Tecumseh. was he promoted for this success in 1812 war? Yes, he received a brevet (temporary) promotion to the rank of major. who was the president during his period as a commander of fort howard? James Monroe. how long did he serve as a president ? From 1817 to 1825. what were some of the major achievements during his presidency? He is perhaps best known for issuing the Monroe Doctrine. what is this doctrine ? It was a United States policy that opposed European colonialism in the Americas.
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Monroe Doctrine [SEP] The Doctrine
The full document of the Monroe Doctrine, written chiefly by future-President and then-Secretary of State John Quincy Adams, is long and couched in diplomatic language, but its essence is expressed in two key passages. The first is the introductory statement, which asserts that the New World is no longer subject to colonization by the European countries: The second key passage, which contains a fuller statement of the Doctrine, is addressed to the "allied powers" of Europe; it clarifies that the U.S. remains neutral on existing European colonies in the Americas but is opposed to "interpositions" that would create new colonies among the newly independent Spanish American republics: