The Proto-Indo-Europeans were a patrilineal society, probably half-nomadic, relying on animal husbandry, notably of cattle and sheep. They domesticated the horse – "ekwos" (cf. Latin "equus"). The cow ("gwous") played a central role, in religion and mythology as well as in daily life. A man's wealth would have been measured by the number of his animals (small livestock), "peḱus" (cf. English "fee", Latin "pecunia").
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