 Property and social differences, tribes and tribal associations arose and people started to move to different areas.The separation of agriculture from cattle-breeding and the substitution of hoe farming by wooden plow farming, notable progress in cattle-breeding led the role of men in society increased and patriarchy (- father khakanate) replaced matriarchal system.The Early Bronze Age was studied in Kul-tepe I (second layer), Kul-tepe II (lower layer) in Nakhchivan, Baba-Dervish in Qazakh, Mentesh-Tepe in Tovuz, as well as, in Mingachevir and Gobustan.