It is only in the past two centuries where demographics and the development of human populations has emerged as a subject in its own right, as industrialization and improvements in medicine gave way to exponential growth of the world's population. There are very few known demographic studies conducted before the 1800s, which means that modern scholars have had to use a variety of documents from centuries gone by, along with archeological and anthropological studies, to try and gain a better understanding of the world's demographic development. Genealogical records One such method is the study of genealogical records from the past; luckily, there are many genealogies relating to European families that date back as far as medieval times. Unfortunately, however, all of these studies relate to families in the upper and elite classes; this is not entirely representative of the overall population as these families had a much higher standard of living and were less susceptible to famine or malnutrition than the average person (although elites were more likely to die during times of war). Nonetheless, there is much to be learned from this data. Impact of the Black Death In the centuries between 1200 and 1745, English male aristocrats who made it to their 21st birthday were generally expected to live to an age between 62 and 72 years old. The only century where life expectancy among this group was much lower was in the 1300s, where the Black Death caused life expectancy among adult English noblemen to drop to just 45 years. Experts assume that the pre-plague population of England was somewhere between four and seven million people in the thirteenth century, and just two million in the fourteenth century, meaning that Britain lost at least half of its population due to the plague. Although the plague only peaked in England for approximately eighteen months, between 1348 and 1350, it devastated the entire population, and further outbreaks in the following decades caused life expectancy in the decade to drop further. The bubonic plague did return to England sporadically until the mid-seventeenth century, although life expectancy among English male aristocrats rose again in the centuries following the worst outbreak, and even peaked at more than 71 years in the first half of the sixteenth century.

Estimated number of workers in each 2011 Census output area in England and Wales, processed and saved in an easy to analyse format. Original Source: https://www.nomisweb.co.uk/datasets/1300_1 This dataset provides 2011 Census estimates of the workplace population in England and Wales by residence type (household or communal resident), by sex and by age. The estimates are as at census day, 27 March 2011. Statistics about the number and demographic characteristics of people are used to monitor differences and track how these proportions change over time. Statistical Disclosure Control In order to protect against disclosure of personal information from the 2011 Census, there has been swapping of records in the Census database between different geographic areas, and so some counts will be affected. In the main, the greatest effects will be at the lowest geographies, since the record swapping is targeted towards those households with unusual characteristics in small areas. More details on the ONS Census disclosure control strategy may be found on the http://www.ons.gov.uk/ons/guide-method/census/2011/census-data/2011-census-prospectus/new-developments-for-2011-census-results/statistical-disclosure-control/index.html[Statistical Disclosure Control] page on the ONS web site. Distributed under Open Government License v3.0: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/

Studies of modern famines tend to consider them ‘man-made’, resulting from war or from adverse shocks to food entitlements. This view has increasingly been applied to historical famines, against the earlier Malthusian orthodoxy. We use a novel dataset and temporal scan analysis to identify periods when famines were particularly frequent in Europe, from ca. 1250 to the present. Up to 1710, the main clusters of famines occurred in periods of historically high population density. This relationship disappears after 1710. We analyse in detail the famines in England, France and Italy during 1300–1850, and find strong evidence that before 1710 high population pressure on resources was by far the most frequent remote cause of famines (while the proximate cause was almost invariably meteorological). We conclude, in contrast with the currently prevailing view, that most preindustrial famines were the result of production, not distribution issues. Only after 1710 did man-made famines become prevalent.