Our ancestors gave up on the lifestyle of marriage and switched to faithful marriage, because women appreciated men's responsibility more than muscle strength.
Herd activity is a popular way of living among the communities during the primitive period. But after some time, our ancestors began to switch to one-wife-one-husband marriage. No one knows for sure why the ancients gave up the herd lifestyle and switched to married couples, although many assumptions were made.
A number of mathematicians at Tennessee-Knoxville University in the United States have created a model to find out what causes humans to switch to marriage mode in pairs, Telegraph reported. According to the model, in the primitive period, men have a strong body and the ability to hunt and catch well is attractive to women and also has a high social position.
In theory, such guys will ensure a full life for women and their children. But in fact, since the strongest men are able to conquer most women in the community, the food they bring cannot meet the needs of all wives. So some women and their children must live in a state of deprivation despite living with the most talented and talented men.
In front of that situation, the guys who do not have the athletic body - which means they have to accept low rankings in the community - have adopted their own tactics to capture the love of women. They only take care of a woman with a very high sense of responsibility, providing everything that women need in their abilities and not flirting with other women. That tactic made the attraction of athletic guys diminish in the weak eyes. After a certain period of time, women began to appreciate love, the responsibility of men is higher than muscle strength.
New perspectives of women make forceful men change behavior. They were forced to give up polygamy if they wanted to be a father. Humans have entered the era of such faithful marriage.
"The human sexual revolution happens when women judge men who are more responsible than those with muscular strength , " the team concluded.