On the far left you’ll get a lot of conspiracies around the CIA thwarting all attempts at socialism.

I’m not sure how many of those can truly be called conspiracies, with the Freedom of Information act, we actually have a pretty significant amount of evidence that the CIA absolutely destabilizes countries that start gravitating toward socialism and replace their leaders with capitalist friendly ones. The CIA backed coup of Salvador Allende in Chili is just one example.

Johnny Harris did a good video on the history of the rest..