Books
The Forgotten Man and Other Essays

Sumner's dominant interest in political economy, as revealed in his teaching and writing, issued in a doughty advocacy of "free trade and hard money," and involved the relentless exposure of protectionism and of schemes of currency-debasement.
On the "Forgotten Man":
He works, he votes, generally he prays — but he always pays — yes, above all, he pays. He does not want an office; his name never gets into the newspaper except when he gets married or dies. He keeps production going on. He contributes to the strength of parties. He is flattered before election. He is strongly patriotic. He is wanted, whenever, in his little circle, there is work to be done or counsel to be given. He may grumble some occasionally to his wife and family, but he does not frequent the grocery or talk politics at the tavern. Consequently, he is forgotten.
References
Yale University Press, 1919