Epigenetics – the underlying mechanism of collective mind sets?

When people associate certain group traits …like sociocentric tendencies among people, could these not be propagated, or have a mechanism rooted in epigenetic switches?

Hence certain traits persist quite reliably among certain groups, all inclined to have similar mind sets,…modifiable of course,but primed to react in certain ways….

Is epigenetics the missing link to cultural evolution? An important mechanism underlying the behaviors real traits that create cohesive societies?