Neither increased life expectancy

We know with good precision l life expectancy from 1750. In the Middle Ages and until about 1780, it was between 25 and 30 years old. It was only from 1800 that she undertook a dizzying ascent, to reach 80 years of age today, most probably thanks to advances in medicine.

The increase in the population which was seen to settle at the end of the 17th century and to continue until around 1780 was therefore not satisfactorily explained. It is most likely due to a multiplication of births, whose cause must be sought. It is indeed possible that this cause remained underlying the demographic explosion as it began at the beginning of the eighteenth century, and is still present today, for example, inducing resistance against any demographic recession.

The number of designs is statistically dependants on the number of coitus (protected or not). It is therefore necessary to ask what new situation may have prompted people of the time to multiply coitus (or to practice them with less caution). It is most likely on the side of a moral change that the key to the riddle is found…