Until the 11 century, peasants had a hard life because they had low yields and constan famine .
But during the 12 century- 13 century every things changes, since six new inventions are applied: horsehoes; the water will, iron tools, the horsecollar, the mulboard ploug and the three-years-crops rotation. There fore, there is more production and this leads to a better nourishment and less diseases, so the population grows.
In the fief there are too many peasants and many of them go to live in cities in search of a better life. They will become artisans or merchants.
