1833, from French atavisme, attested by 1820s, from Latin atavus "ancestor, forefather," from at- perhaps here meaning "beyond" + avus "grandfather," from PIE *awo- "adult male relative other than the father" (see uncle).
1. They are explainable as a species of mental atavism.
2. The civilization craftsman mythology usually exceeds the originality craftsman mythology, though sometimes with the atavism.
3. The atavism appears in the crisscross inheritance as well as in the other genetic way.