Not until the beginning of the 20th century did Europe's urban populations finally become self-sustaining: before then, constant immigration of healthy peasants from the countryside was necessary to make up for the constant deaths of city dwellers from crowd diseases.
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About Jared Diamond
Jared Diamond was a contemporary American scientist, historian, and author. Jared Mason Diamond is an American scientist, historian, and author. He has written hundreds of scientific and popular articles and books, most notably Guns, Germs, and Steel (1997), which received multiple awards, including the 1998 Pulitzer Prize for general nonfiction. Read more on Wikipedia →
Themes
- History — Lessons from the past and the arc of human civilisation