On a scale of complexity Tengrism lies somewhere between the Proto-Indo-European religion (a pre-state form of pastoral shamanism on the western steppe) and its later form the Vedic religion. The chief god Tengri ("Heaven") is considered strikingly similar to the Indo-European sky god *Dyḗus and the East Asian Tian (Chinese: "Sky; Heaven"). The structure of the reconstructed Proto-Indo-European religion is actually closer to that of the early Turks than to the religion of any people of neolithic European, Near Eastern or Mediterranean antiquity.