In the 18th century, population growth in all parts of the world. It was always very slow because of high birth rates that were invalidated by high death rates. However, during the following centuries, the death rate fell, with more people being born than dying. Because living conditions were improved and agriculture improved.
Initially, the demographic transition was intended to explain the relationship between demographic changes and socioeconomic changes that occurred in the eighteenth century in the developed countries of Europe and therefore establish a causal relationship between population, development and demographic growth.
