Disclaimer: I don't know what populism is, actually.

3. What is populism and how did it interact with nationalism during the 1930's in Latin America?

So like there was a lot of land, and it was divided up by things like Spain and Portugal, and they ruled it. But the Original Inhabitants of these lands didn’t like the whole ruling thing, so they got mad and started shooting and stuff. Spain and Portugal were like, “whoa dude, these guys are revolting…we must stop them,” and so they started working on stopping them. But, the Original Inhabitants unified under the cause of Nationalism, which pulled them together into units of cohesiveness, which then in turn worked to revolt effectively against the Spaniards and Portuguese. So then Spain and Portugal were like, “Who cares…we didn’t even like this place anyhow! There are too many mosquitoes, plus, we can always invade California or Africa...” and sailed off across the ocean blue.

Then there was squabbling amongst the Original Inhabitants of this land. Or rather, by this point, they were Original Inhabitants plus lots of other people who had moved to this land and weren’t kicked out. So the squabbles were confusing because there were a lot of sides to the squabbling. They needed to pull their act together and unify, but they were fresh out of unification ideas, unless you count the unification ideas that involved guns. And they had already used Nationalism once. They couldn’t use it again, because people figured out that nationalism had a lot to do with the Poor Working Class, and the people squabbling were the Urban Middle to Upper Classes of people. The Poor Working Class was out planning squash and trying to survive. Finally, a smart person was like, “POPULISM!!” and someone else was like, “Dude! What is that?” and the smart person was like, “It’s just like Nationalism, only it’s for the Urban Middle to Upper Classes!” So they all sat around and ate squash and stuff and planned strategies.

So then the people unified mostly under Populism, and made sure that the people they elected as presidents agreed with them, except for the ones who were like dictators or rigged elections or shot people who disagreed with them. And thus we have Latin America.