How did the population increase of the 20Th century differ from population increase of previous centuries?

The population increase of the 20th century was characterized by unprecedented growth rates, largely due to advancements in medicine, sanitation, and agriculture that significantly reduced mortality rates and improved life expectancy. In contrast, previous centuries experienced more gradual population increases, often constrained by high mortality rates from disease, famine, and war. The 20th century also saw urbanization and migration patterns that contributed to population density in cities, while earlier population dynamics were more localized and agrarian. Additionally, the global scale of population increase became more pronounced, with significant demographic shifts in developing regions.