“But the Monroe Doctrine is not a treaty that Russia or anyone else must abide by”
And the oft forgotten part of that doctrine was that we would not interfere in that part of the world.
“And the oft forgotten part of that doctrine was that we would not interfere in that part of the world”
Really? Where did you learn that? Its total BS. Because the Monroe Doctrine was not a negotiated deal, it was simply the US telling our adversaries, and our potential future adversaries in the Eastern Hemisphere that the US would not allow an Eastern power to establish military bases and dominance in the West. And even if what you claim were true it doesn’t matter because there is no enforcement mechanism except militarilly between those nations. And even if there was international law that would matter not either for the same reason.
The same rules apply now in Geopolitics as applied at the very beginning, the guy with the biggest stick wins because he can do whatever he wants and if nobody stops him then thats the way it is. Geopolitics is really just the rule of the jungle in practical terms.