Full Idea
If a community is what absolutely determines the nature of humans, then the drive that allows the community to be preserved will be most forcefully developed in them.
Gist of Idea
Humans are determined by community, so its preservation is their most valued drive
Source
Friedrich Nietzsche (Unpublished Notebooks 1884-85 [1884], 27[030])
Book Reference
Nietzsche,Friedrich: 'Fragments from 1884-85 (v 15)', ed/tr. Loeb,P.S./Tinsley,D.F. [Stanford 2022], p.263
A Reaction
Nietzsche was a loner, who despised 'the herd' and its dull 'good and evil', but humans are obviously social creatures, who need to raise families, so it seems perverse to despise the values this requires. Note the Marxist view of human nature.