Sociologo inglese (Londra 1911 - ivi 1978), prof. alla London School of Economics. Opere principali: The town in changing world (1935); The struggle for population (1936); Population policies and movements in Europe (1940); Social mobility in Britain (1954); The trend and pattern of fertility in Great Britain (1954); Differential fertility, ability and educational objectives (1962); ha diretto Introduction to Malthus (1953); Demography (1957); Population in history (1965); Numbering the people (1973).