The Monroe Doctrine was delivered by President James Monroe on December 2, 1823, in the US Congress. In his speech, James made it clear that the continent should not accept any kind of European intrusion on any aspect, ie, “America for Americans”.
The doctrine's ideology was based on three basic principles: the impossibility of creating new colonies across the continent, intolerance to the interference of European nations in internal matters and the non-participation of the United States in conflicts involving countries Europeans.
The doctrine was against colonialism in lands on the American continent, this is so true that the United States was the first to recognize the independence of countries previously colonized by the Spain.
What motivated this doctrine was the threat by the Holy Alliance (composed of European countries like Austria, Russia, and France) to return to colonize the American countries.
Apparently, the United States was facing Europe to defend the Latin countries, however, what was being defended were only the North American interests.
By Eduardo de Freitas
Graduated in Geography
Brazil School Team
General geography - geography - Brazil School
Source: Brazil School - https://brasilescola.uol.com.br/geografia/doutrina-monroe.htm