"Monopoly" is derived from "The Landlord's Game" created by Lizzie Magie in the United States in 1903 as a way to demonstrate that an economy that rewards wealth creation is better than one where monopolists work under few constraints, and to promote the economic theories of Henry George—in particular his ideas about taxation. "The Landlord's Game" had two sets of rules originally, one with taxation and another one mainly based on current rules. When Monopoly was first published by Parker Brothers in 1935, it did not include the less capitalistic taxation rule, which resulted in a more competitive game. Parker Brothers was eventually absorbed into Hasbro in 1991. The game is named after the economic concept of monopoly—the domination of a market by a single entity.