According to Mark Dyble, egalitarian society was the society during the time of people who were hunter-gatherers. They each value the members of the group as equal. Each member is important and has a voice on how the community should proceed.
The equality of each member shifted when the dawn of agriculture came, it was the time when men wanted to own or acquire more possession. They wanted to have more land, more wives, more children, and more power over all others. Thus, inequality among men and women reigned.