From the time of Malthus, the insufficient supply of food resources has
been considered the main constraint of population growth and the main
factor in the high mortality prevailing in pre-industrial times. In this
essay, the mechanisms of biological, social and cultural nature linking
subsistence, mortality and population and determining its short and long
term cycles are discussed. The author's analysis examines the existing
evidence from the century of the Great Plague to the industrial
revolution, interpreting the scanty quantitative information concerning
caloric budgets and food supply, prices and wages, changes in body
height and epidemiological history, demographic behaviours of the rich
and of the poor. The emerging picture sheds doubts on the existence of a
long term interrelation between subsistence of nutritional levels and
mortality, showing that the level of the latter was determined more by
the epidemiological cycles than by the nutritional level of the
population.