"Comparative advantage" has always embodied, to me, the difficulty with electoral politics. It's a fairly easy concept, taught fairly widely, yet almost no one really understands it and views the world through that lens. Most voters are operating without an understanding of comparative advantage.
Now apply that to dozens of other concepts in other fields. Same situation. It's depressing.
Now apply that to dozens of other concepts in other fields. Same situation. It's depressing.