In 70 AD the world’s most powerful civilization destroyed Jerusalem and demolished the Temple of Herod. No brick or stone was left untouched.
30 years later, in 100 AD the Roman strength had dramatically atrophied due to an excess of indulgence. Sexual excesses may have reduced human fertility to the extent that in 161, the Roman Emperor Marcus Aurelius enrolled slaves, gladiators, policemen and criminals to replenish his army.
By 192, the emperor Pertinax offered farms gratis (free of cost) to anyone who would till them. In 193, the government was openly speaking of a shortage of men. Historians would later report than the male population had been halved.