The manorial system's importance as an institution varied in different parts of Europe at different times. In western Europe it was flourishing by the 8th century and had begun to decline by the 13th century, while in eastern Europe it achieved its greatest strength after the 15th century.
Why did feudalism and Manorialism eventually end?
Decline in Manorialism
The systems of both feudalism and manorialism were weakened by several developments in the late Middle Ages. One particular blow came from the sudden population declines caused by wars and plagues, particularly the Black Death (which peaked between 1347-1352).
What ended the manorial system?
Many economic and political factors contributed to the extinction of the manorial system. The spread of trade and a money economy promised greater profit to capitalist production than to the subsistence manor; the growth of new centralized monarchies competed with the local administration of the lord.