First Published in 1966. A book which deals with the thought and theories of leading men 17th and 18th century England, on the subjects of population and vital statistics. Beginning with Raleigh, Bacon and Hobbes, it passes to Harrington, Graunt and Halley. Then after Derham and Sussmilch, it treats the disputes of Hume and Wallace, Price and Arthur Young over Ancient and Modern Populousness.