One of the earliest demographic studies in the modern period was Natural and Political Observations Made upon the Bills of Mortality
(1662) by John Graunt, which contains a primitive form of life table.
While basic demographic studies, such as censuses, were conducted in the ancient world as far back as 6,000 years ago, demographers as we know them, such as John Graunt from the United Kingdom, came about in the 16 th century. The earliest statistical studies were concerned mostly with mortality (how many people died and at what age).
Demographic ideas can be traced back to antiquity, but it is generally accepted that demography originated in the middle of the
17th century with the English statistician, John Graunt (1620–74), and his primitive life tables, which were the first attempt to examine statistical regularities inherent within the numbers …The term demography was irst used in
1855 by the Belgian statistician Achille Guillard in his book Elements of Human Statistics or Comparative Demography (Borrie, 1973: 75; Rowland, 2003: 16).