Demography is the factual investigation of populaces, particularly people. In old Greece, this can be found in the works of Herodotus, Thucidides, Hippocrates, Epicurus, Protagoras, Polus, Plato and Aristotle.

Segment investigation can cover entire social orders or gatherings characterized by measures, for example, training, nationality, religion, and ethnicity. Instructive institutions as a rule treat demography as a field of humanism, however there are various autonomous demography departments. Based on the segment examination of the earth, earth's populace up to the year 2050 and 2100 can be assessed by demographers.

Formal demography restricts its object of study to the estimation of populace forms, while the more extensive field of social demography or populace concentrates likewise investigations the connections between financial, social, social, and natural procedures impacting a population.Demographic musings followed back to vestige, and were available in numerous civilisations and societies, similar to Ancient Greece, Ancient Rome, China and India. Demography is comprised of two word Demos and Graphy . The term Demography alludes to the general investigation of populace.

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