Sumner, William Graham: Entry from the Columbia Encyclopedia.
The Challenge of Facts: Sumner's essay criticizing socialism.
The Forgotten Man: Sumner's essay criticizing trades unions and temperance legislation.
The Rich Are Good-Natured: Sumner's essay suggesting that the misunderstood ambitions and intentions of the wealthy would benefit everyone.
William Graham Sumner: Bibliography and resources.
William Graham Sumner: Article from the Wikipedia open encyclopedia project.