A Kurgan culture were people from the Pontic steppe north of the Black Sea . They led a series of essentially hostile, military incursions where a new warrior culture imposed itself on the peaceful, matriarchal earth-worshipping cultures (mother goddess) cultures of "Old Europe", replacing it with a patriarchal warrior society a process visible in the appearance of fortified settlements and hillforts and the graves of warrior-chieftains. New patriarchal gods such as that of thunder (Thor, Zeus) was introduced. The process of Indo-Europeanization was a cultural, not a physical, transformation. It must be understood as a military victory in terms of successfully imposing a new administrative system, language, and religion upon the indigenous groups. As a result most European languages share a common origin due to it be derived from the ancient Kurgan culture.

Liberals can considered as closer descendants of the old matriarchal earth worshipping cultures of Old Europe & Conservatives (especially in the US) can be considered closer descendants of the old patriarchal thunder worshipping warrior cultures of New Europe. Earth worshipping pacifist farmers practised a form of communal and tribal egalitarianism, whereas the new warrior cultures practised social hierarchy characterized by strength lead by their warrior chieften.