Political Memes

From your source:

The Monroe Doctrine is a United States foreign policy position that opposes European colonialism in the Western Hemisphere. It holds that any intervention in the political affairs of the Americas by foreign powers is a potentially hostile act against the United States. The doctrine was central to American grand strategy in the 20th century.

President James Monroe first articulated the doctrine on December 2, 1823, during his seventh annual State of the Union Address to Congress (though it was not named after him until 1850). At the time, nearly all Spanish colonies in the Americas had either achieved or were close to independence. Monroe asserted that the New World and the Old World were to remain distinctly separate spheres of influence, and thus further efforts by European powers to control or influence sovereign states in the region would be viewed as a threat to U.S. security. In turn, the United States would recognize and not interfere with existing European colonies nor meddle in the internal affairs of European countries.

Honestly I think that is far too generous a description for Monroe, but it blatantly is Anti-Imperialist as described in that text.

I acknowledge the CIA have done horrible things in South America, but the USA has not forcefully consumed more land since the 1850s, ignoring small island nations caught in disputes such as the USA Guano Islands Act much of which was later reclaimed by the UK, and the lands taken control over during WWII after the Dai Nippon Empire had colonized them and then lost grounds during said war.