Final answer:
Peasants left manors due to labor shortages after events like the Black Death, which led to improved wages and conditions for them and weakened the feudal system, contributing to the rise of capitalism and the modification of the social and economic fabric of Europe.
Step-by-step explanation:
Peasants began to leave the manors during periods of crisis such as the aftermath of the Black Death. The Plague led to a drastic reduction in population, which in turn caused labor shortages. This allowed peasants to demand better wages and terms of labor. Nobles needed workers for their lands and were willing to offer more to attract them. Consequently, many peasants moved to other lands with better opportunities or to growing cities in search of wage labor. In addition, the demand for agricultural workers led to rising wages for peasants and the gradual decline of serfdom.
The result of these movements had profound effects on both the peasants and the nobles. For peasants, this meant improved living conditions and wages, and even the fading away of serfdom in certain areas. For the nobles, it meant a loss of the traditional fealty and services of the peasants, shrinking their labor force, and weakening the feudal system. These shifts also spurred peasant rebellions and contributed to the rise of stronger monarchies and the growth of urban economies.
Ultimately, this transition was a contributing factor in the collapse of the feudal system and was instrumental in paving the way for the rise of capitalism and industrial society, fundamentally altering the social and economic landscape of Europe.