It was originally designed to convince people that capitalist greed and acting as a landlord is morally abhorrent and the whole system should be replaced with socialism. The idea was, and I am not joking or exaggerating at all, to play the monopoly you know, and realize that it's the worst game. Then, you play it with slightly different rules that change how land ownership and rent works, and you realize that literally everyone can win, and everyone plays cooperatively.

Then, capitalists saw it, stole the idea, and the original inventor didn't have sufficient money to fight for her exclusive rights, so now we have only the capitalist, rent-seeking shit show of a game that Parker brothers stole.

It's not "monopoly". It's The Landlord's Game.