May 31, 2018
Women dominated the world thousands of years ago after the male population came under severe threat, resulting in a wipe out of the Y chromosome that is still felt today.
7000 years ago men were a sub-species ruled by WOMEN & outnumbered 20 to 1, scientists say
scientists have now discovered new evidence to show male diversity almost completely collapsed 7,000 years ago, in a disaster so extreme there was only one man for every 17 woman, staying that way for the next 2,000 years.
According to researchers at Stanford University, the wipe out came after centuries of wars between male dominated group, called patrilineal clans.
Scientists observed modern DNA and noticed a pattern of chromosome trends.
However, new research has brought about even more astonishing findings.
Neolithic remains from ancestral tribes all over Europe they likely fought in full-scale wars around 5,500 years ago, using clubs, axes and arrows to fight off their enemies.
The war was so severe that it caused the male population to plummet to extremely low levels, reaching an astonishing one-twentieth of its original level.
This was known as 'Neolithic Y-chromosome bottleneck', a time where human genetic diversity reduced massively, with its effects felt across the world.
According to genetic patterns, researchers found the decline was only noticed in men - particularly on the Y chromosome, which is passed on from father to son.
The group of scientists, led by Tian Chen Zeng, a Stanford undergraduate in sociology, wrote in their published paper: "An abrupt population bottleneck specific to human males has been inferred across several Old World (Africa, Europe, Asia) populations 5000–7000 BP."
7000 years ago men were a sub-species ruled by WOMEN & outnumbered 20 to 1, scientists say
7000 years ago men were a sub-species ruled by WOMEN & outnumbered 20 to 1, scientists say
Their findings suggested that a high population of men were dying before they had a chance to mate and produce offspring, leading researchers to believe it resulted after centuries of war.
Previous studies also show trauma marks present on skulls clearly indicate the fighters used axes, clubs and arrows to kill each other.
Scientists from Stanford used mathematical models and computer simulations, in which men fought and died - allowing them to test their theory on 'Neolithic Y-chromosome bottleneck'.
One of the researchers, Professor Marcus Feldman, a professor of biology in Stanford's School of Humanities and Sciences said they now aim to find any "historical and geographical patterns of cultural interactions that could explain the patterns you see in genetics".
7000 years ago men were a sub-species ruled by WOMEN & outnumbered 20 to 1, scientists say

Latest studies also show that the Y chromosome only has 4.6 million years left, which is not a long time considering life on Earth has existed for 3.5 billion years.
Y chromosomes have a "fundamental flaw", according to researchers at the University of Kent, Dr Peter Ellis and Professor Darren Griffin.
They said that unlike other chromosomes in our DNA which have two copies each, Y chromosomes only have one.
Because they are only presented as a single copy, Y chromosomes are unable to "shuffle" and recombine with other chromosomes, which occurs throughout generations to help prevent unwanted gene mutations.
This results in the loss of Y chromosomes as they are slowly deteriorate over time and eventually wiped out from the genome.
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