The liberty of man consists solely in this: that he obeys natural laws because he has himself recognized them as such, and not because they have been externally imposed upon him by any extrinsic will whatever, divine or human, collective or individual.
Bio: William Graham Sumner was a classical liberal American social scientist. He taught social sciences at Yale, where he held the nation's first professorship in sociology. He was one of the most influential teachers at Yale or any major schools.