Full Idea
It is sharing a common view in good and evil, justice and injustice, that makes a household and a state.
Gist of Idea
A community must share a common view of good and justice
Source
Aristotle (Politics [c.332 BCE], 1253a17)
Book Reference
Aristotle: 'Politics', ed/tr. Sinclair,T.A. /Saunders,T. [Penguin 1992], p.60
A Reaction
This idea comes up against the modern idea of pluralism (e.g. in Isaiah Berlin), which is inevitable in huge states with a lot of migration.