Mostly Marginal Revolution and whatever he links to. He's got a way of making economics accessible that I've yet to really see elsewhere.
I wasn't being literal. It's not very complicated, and you can understand it, but there's a lot of hidden context involved and the consequences of ignorance in that space are immense.
Geopolitics is NOT nuclear science. It's much less complicated.
If somebody's trying to convince you that it is too complex for the layman to understand, they're likely trying to conceal something.