A scientist who studies human populations, including their size, growth, distribution, and vital statistics like births, deaths, and migration.
From French 'démographe,' combining Greek 'demos' (people) + 'graphia' (writing/description). The term was coined in the mid-19th century as population study became an important social science.
Demographers predicted the population boom after World War II before it happened—they're basically fortune tellers for humanity, using math instead of crystals to anticipate how many people will exist in 2050.
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