From the tenth to the sixth centuries B.C., the Greeks were able to form colonies from Spain to the Caucuses. Geneticists can still find traces of this colonization across the Mediterranean basin. When Ancient Greece was at its peak in the fifth and fourth centuries B.C., writers considered the city-states overpopulated. But by the second century B.C., Polybius would write:
“In our own time the whole of Greece has been subject to a low birth-rate and a general decrease of the population, owing to which cities have become deserted and the land has ceased to yield fruit although there have neither been continuous wars nor epidemics...For men had fallen into such a state of pretentiousness, avarice and indolence that they did not wish to marry, or if they married to rear the children born to them, or at most as a rule but one or two of them.”
As Greece fell, Rome rose. The evolution of that civilization seems to have been similar. After Hannibal and his troops wiped out 80,000 Roman soldiers in the third century B.C. there was no trouble in raising a new army. But only two centuries later Ovid would lament, “Rare is in our time [the woman] who wants to be a parent.” [Raraque in hoc aevo est quae velit esse parens.]
The emperor Augustus passed laws to increase fertility, but they were a failure. The rulers of the Antonine dynasty remained childless. They were able to maintain good governance that way because there were no incompetent or evil sons to take power. Unfortunately, there would soon be nobody to govern.
Actually, not everybody stopped breeding. There was one small cult the encouraged its flock to “be fruitful and multiply”. That cult was, of course, Christianity.
To have a respectable hypothesis about why Christians displaced pagans, all we have to do is use the same logic that might explain why the Cro-Magnons replaced the Neanderthals. If from 50 A.D. to 450 A.D. Christians had a 20 percent higher fertility rate than Pagans, Christians could’ve gone from two percent of the population to 20 percent. And the difference in birth rates was probably much larger.In Europe today, whites are the new Pagans and Muslims the new Christians.
I highlighted that last part to illustrate how asinine such arguments are.
The native Europeans circa 3rd century through the 11th century BECAME Christians. They didn't immigrate into Europe from elsewhere.
The muslims in Europe today are not native Europeans converting. They're the result of mass migration.
The argument that the falling birthrates in The West is connected with thirdworld immigration is mere propaganda from the left.
There are more than 3 times as many people in Europe today as there was just two hundred years ago.
There are, if anything, too many people in The West today, not too few.