I understood Americans much better once I understood Calvinism.

The very belief that a core group of the first settlers brought to America which is that there exist not just fundamentally good and bad people, but that God would reward good people with success and money and bad people with poverty.

From which follows that rich people must have been good and poor people must have been bad.

From which follows, that good people need to be rewarded further and bad people punished more.

If you look through every single aspect of the U.S. judicial, education, legislation [,...] systems — even Hollywood movies — you will find clues that point back to this core belief.

Not judging, just noticing since someone told me "in order to understand Americans, you need to understand Calvinism".