Posted on 04/26/2016 11:36:26 AM PDT by SunkenCiv
The largest ever study of global genetic variation in the human Y chromosome has uncovered the hidden history of men. Research published today (25 April) in Nature Genetics reveals explosions in male population numbers in five continents, occurring at times between 55 thousand and four thousand years ago... analysed sequence differences between the Y chromosomes of more than 1200 men from 26 populations around the world using data generated by the 1000 Genomes Project... involved 42 scientists from four continents...
Analysing the Y chromosomes of modern men can tell us about the lives of our ancestors. The Y chromosome is only passed from father to son and so is wholly linked to male characteristics and behaviours. The team used the data to build a tree of these 1200 Y chromosomes; it shows how they are all related to one another. As expected, they all descend from a single man who lived approximately 190,000 years ago...
The earliest explosive increases of male numbers occurred 50,000-55,000 years ago, across Asia and Europe, and 15,000 years ago in the Americas. There were also later expansions in sub-Saharan Africa, Western Europe, South Asia and East Asia, at times between 4,000 and 8,000 years ago. The team believes the earlier population increases resulted from the first peopling by modern humans of vast continents, where plenty of resources were available.
The later expansions are more enigmatic.
Dr Chris Tyler-Smith, from the Sanger Institute, added: "The best explanation is that they may have resulted from advances in technology that could be controlled by small groups of men. Wheeled transport, metal working and organised warfare are all candidate explanations that can now be investigated further."
(Excerpt) Read more at eurekalert.org ...
While I hope you are correct;what you say looks good on paper, but I fear that you have now millions of young men who want wives and have none available in their immediate surroundings. I don’t think we will see these young men seeking after celibacy and a retiring lifestyle. China is militarizing as fast as it can. Her leaders are very happy to have such human resources available for cannon fodder. Chinese leadership may hold out the carrot of “To the victor goes the spoils”...and for many of those Chinese young men, some of those spoils could be another country’s women.
Something like half of Chinese men under 50 yrs old won’t marry, won’t have siblings, won’t have children. Those Chinese men and women who do marry will often be caring for all four parents at some point, as well as raising their mandatory one child (I think China finally lifted that law, which was underenforced). Just keeping that whole country engaged in industrial development, building stuff, making goods, and earning money, will likely be sufficient to keep them from fighting a large land war in which they’d have a massive manpower advantage (during the invasion of the two million Chinese “volunteers” Mao sent into the Korean conflict, some 100s of 1000s died, and the reaction in China was, oh well). Beginning in 20 to 30 years, the largest part of that demographic bulge will enter geriatricity, and a couple generations from now, 80-90 percent of them will be dead. The main problem China faces is a population *implosion*, and a growing need to import literally tens of millions of guest workers to care for the aged men who have no siblings, no remaining parents, no spouse or ex-spouse, and no descendants.
By contrast, the US population is likely to double in the next 20-30 years, double again 20-30 years after that, etc, and that’s my conservative estimate — thanks to higher reproductive rates, immigration, and a steep economic expansion, by 2100 the US population will be north of 1.5 billion. My more generous estimate is, north of 3 billion.
http://www.freerepublic.com/focus/news/1774468/posts
http://www.freerepublic.com/focus/bloggers/1311725/posts?page=17#17
http://www.freerepublic.com/focus/chat/3188319/posts?page=62#62
Thanks for the insight, SunkenCiv. I had not heard that the one child policy had been lifted, nor the other sociological info you mentioned wrt their own male baby boom generation.
I am always so happy to learn from other Freepers in our conversations over the cyber backyard fence!
I pray that your insight is correct and that China has no likely designs for a land war.
In that “2034” topic post, I think I predicted that China would fight (and lose) some short land wars with neighbors, and gradually become embroiled in a large internal struggle with ethnic and jihadist groups. The latter is coming to pass. The former may be foreshadowed by other moves the regime has been making. As a consequence, the Chinese will need to stay on our good side. But in 85 short years, the US will still be dominant, probably even more dominant, in the world, which means the faux predictions that they’ll be entering a post-US world will become louder. :’)
Except that European-Americans are reproducing at rates only slightly higher than Europeans, and barely replacement.
That means most growth comes from immigration, which has featured more illegals than legals.
But, if Republicans become successful in stopping inflows of illegals (read: future Democrat voters), then you can be near certain Democrats will insist on slowing down legal immigrants (read: potential future Republicans).
Then net result could be US population growth not much higher than other more "advanced" countries.
Think about it.
It is true that the one child policy has been lifted, I think to 2 permitted. There was never a 1 child mandate, but rather a 1 child restriction. SC I don’t think the population estimates you have given are quite so high. I am leaving on a trip, so no time to research, but here is a link with lots of data.
Thanks for the link and the specifics in our discussion.
Immigration will account for a lot of the growth, both directly (less) and indirectly (the American-born offspring and other descendants, more). :’)
There was an estimate that the world population would top out around 2050, at 9 billion, but whomever wrote that must have been hittin’ the cookin’ sherry. Uh-oh, looks like someone started a brand new keyword...
http://www.freerepublic.com/tag/carryingcapacity/index
The US has about 322 million, world has 7.2 billion; if the ratio endures (there’s no reason to expect that, but anyway), an increase in US population to 1.4 billion by AD 2100 implies a world population between 62 and 63 billion. :’) By contrast, US population in 1900 shows about 76 million (almost none of whom are now alive) compared with about 1 billion world population (7.6 percent). The 2014 figure (most recent available for both on the website below) works out to about 4.3 percent of the world’s population. With a ratio closer to that of AD 1900, world pop looks more like 40 billion.
In the past 15 years, US population has (it sez here) grown by 39.91 million, say 40 million, of whom perhaps 15 million are in the country illegally. The 16 year period from 1984 to 2000 saw an increase of 46.34 million, IOW, slightly slower growth in the second half of that 32 year period.
US population by year back to 1900:
http://www.multpl.com/united-states-population/table
World:
http://www.multpl.com/world-population/table/by-year
China:
http://www.multpl.com/china-population/table/by-year
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