Johann Peter Süssmilch

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Johann Peter Süßmilch or Süssmilch (September 3, 1707 in Zehlendorf – March 22, 1767 in Berlin) was a German Protestant pastor, statistician and demographer.

He studied medicine and theology at Jena and Halle and in 1741 was an army chaplain in the First Silesian War. On Sunday, 13 August 1741, the former field preacher gave his inaugural sermon as pastor of the community Etzin.[1] In 1742 he took a post as Provost in the St. Petri parish in Berlin-Cölln. He became a member of the Prussian Academy of Sciences in 1745. He conversed with Gotthold Ephraim Lessing and Immanuel Kant.

Berlin memorial plaque, Berlin-Mitte (Brüderstr. 10)

Süßmilch's most important publication on The Divine order in the circumstances of the human sex, birth, death and reproduction, which he wrote in 1741, is regarded as a seminal and pioneering work in demography and the history of population statistics. Süssmilch discovered that, in the long term, there is a constant sex ratio of 1,000 female births to 1,050 male births. He saw this as a proof of the Divine working in this World. Due to this work, he can be regarded as one of the founding fathers of demography in Germany. However, he refers in his work to Caspar Neumann's work, who calculated a monthly statistics of deaths by age and death cause already between 1687 and 1691 in Breslau (present-day Wrocław). Süssmilch also worked on life tables.

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