Friendship is the trump card in the movement for equality, not etiology.
This equality is quite different from the type he sought in terms of civil rights.
Would he tell his daughters not to believe in equality for the sake of their ability to take a joke?
late 14c., "evenness of surface, uniformity of size;" c.1400, in reference to amount or number, from Old French equalité (Modern French égalité, which form dates from 17c.), from Latin aequalitatem (nominative aequalitas) "equality, similarity, likeness" (also sometimes with reference to civil rights), from aequalis (see equal). Of privileges, rights, etc., from 1520s.