The lives that were lost in seven years because of the Black Death would recover in at least 200 years, the countryside was depopulated and the city fortified concentrating fortunes, many wealthy bourgeois decided to invest large sums of money in the field, very soon the countryside grew and in the cities the bourgeoisie increasingly had more power. It begins a technical development where the machines reduce the amount of work and force required. This technical ascent left inventions such as: paper, gunpowder in firearms, mechanical clock, blast furnaces and printing, among others.
