The volunteer environmental group live by the ethos of preserving the planet for future generations.
An example of an ethos is the community goals set in a mission statement.
Origin of ethosClassical Greek ?thos, disposition, character: see ethical
Origin of ethosGreek ēthos character ; see s(w)e- in Indo-European roots.
(plural ethe or ethea)
From Ancient Greek ἦθος (ēthos, “custom, habit”).