With the richest land in western Europe, why is the modern population not as good as Germany?

The religious wars and continuous revolutionary movements in France, as well as many overseas colonies, led to a large number of people fleeing or immigrating. Malthus's theory made the French prefer pleasure to having children, and eventually it became the present state.

Malthus' theory is based on the unsynchronized growth of population and productivity, and the industrial revolution brought about a leap in productivity. France's industrial revolution is not as good as Germany's, so the latter's influence should also be great. The period when the French population reached its peak in Europe should be the Napoleonic period. In the whole19th century, the population growth rate of France was slow. The Franco-Prussian War can be described as a turning point in the national movement and population of Germany and France. It is estimated that around 1900, the population of Germany exceeds that of France, and Germany has absorbed many Slavic immigrants.