Historians have painted it as a dark period that precedes the splendor of the Renaissance; this interpretation has been criticised by historiography in the last decades. In that period, the average life expectancy was around 45 years. It was a period of endemic famines and wars, which affected the demographic rate in all the social classes, even if the social inequality in the dead people was already relevant. Personal, familiar hygiene in urban concentrations, was inexistent; waters were taken from wells in the countryside; the drains of the sewers were almost always in sunlight; houses were unhealthy, malconstructed and at the mercy of the colonization of rats and sewer animals. Nutrition was poor in nutrients, due to chronic poverty.