The lower level along with beggars, and outcasts of the third State or the plain level or State people, very heterogeneous sector with more than 95% of the population in the former regime of feudalism and the modern period up to the time of revolutions industrial, political and social of late 18th century and early 19th. The serfs were peasants who worked the land of the noble and ecclesiastical free to decide about his life and activity as were inextricably linked to the Earth working passing to the heirs of these lands, as well as their children and their children's children. They were the example clearer of medieval slavery and the modern age. Their current children are laborers without ground working for the gentlemen of the Holy Innocents or elsewhere.