noun /ˈmɔː.reɪz/
A set of moral norms or customs derived from generally accepted practices. Mores derive from the established practices of a society rather than its written laws.
All of us seem to need some totalistic relationships in our lives. But to decry the fact that we cannot have only such relationships is nonsense. And to prefer a society in which the individual has holistic relationships with a few, rather than modular relationships with many, is to wish for a return to the imprisonment of the past—a past when individuals may have been more tightly bound to one another, but when they were also more tightly regimented by social conventions, sexual mores, political and religious restrictions.
Wikipedia foundation.