The original rules of Monopoly were meant to demonstrate what was wrong with capitalism. What went wrong?

Under the ‘Prosperity’ set of rules, every player gained each time someone acquired a new property (designed to reflect George’s policy of taxing the value of land), and the game was won (by all!) when the player who had started out with the least money had doubled it. Under the ‘Monopolist’ set of rules, in contrast, players got ahead by acquiring properties and collecting rent from all those who were unfortunate enough to land there – and whoever managed to bankrupt the rest emerged as the sole winner (sound a little familiar?).

The game was originally called Monopolist, and we know that Monopolists and Monopolies are bad, but the game, of course, rewards you for becoming one!

Source: Monopoly was invented to demonstrate the evils of capitalism | Aeon Ideas