Scope and Contents Black hardcover book. Front cover: What Social Classes Owe to Each Other - William Graham Sumner Spine: Social Classes - Sumner Obtained by Morse on September 8, 1883 Sumner was a Professor of Political and Social Science at Yale CollegeI: On a New Philosophy: That Poverty is the Best Policy II: That a Free Man is a Sovereign, But That a Sovereign Cannot Take "Tips" III: That it is Not Wicked to be Rich; Nay, Even, That it is Not Wicked to be Richer Than One's Neighbor IV: On the...