The scientist who also won the Pulitzer Prize for his book Guns, Germs and Steel Jared Diamonddiscusses the reason for this situation in his book The Third Chimpanzee.

According to Diamond, a professor of geography at the University of California who, despite studying physiology, is also interested in various fields such as anthropology, ecology, geography and evolutionary biology. hidden in our social and sexual organization.

The large alpha males set up a harem, making the males larger than the females.

females with one big man was mating. The greater the number of females in the male’s harem, the greater the size difference between the sexes. In addition, this situation is seen not only in humans, but also in other species. The larger the harem, the larger the males of that species than the females.

For example, because gibbons are monogamous, there is no size difference between males and females.

Male gorillas are twice the size of female gorillas because there are three to six females in their harem. Average number of females in the southern elephant seal harem forty eight The size difference is much greater, as males weigh three tons, while females weigh only three hundred kilograms.

Unlike our ancestors, being tall is no longer a determining factor in modern society.

Women are nowadays intelligence and personality attaches more importance and monogamy is now much more common. Of course, women still prefer men who are taller and muscular than they are now, but since it’s not as intense as it was in the early days of humanity, it doesn’t seriously impact evolution. If it continues like this from now on, the evolution of humanity is not a physical feature. cognitive characteristics will affect.