Full Idea
Every society of good men (that is, originally, of powerful men) places gratitude among its first duties.
Gist of Idea
All societies of good men give a priority to gratitude
Source
Friedrich Nietzsche (Human, All Too Human [1878], 044)
Book Reference
Nietzsche,Friedrich: 'Human, All Too Human', ed/tr. Faber,Marion [Penguin 1994], p.46
A Reaction
His reason here is that gratitude is a way of displaying the power of the powerful!