What was on of the main effects of the black death in europe

More than one third of the whole European population died, which led to economical crisis, as there were not so many people who were able to farm. Therefore, a great famine also appeared that led to decline of feudal system in Europe.

Explanation:

Black Death in the 14th Century was one of the greatest pestilences that struck the Old World, especially Europe. Not only that people were dying, but also the morale was decaying, church started losing its influence furthermore. It led to many important changes in the Europe that afterwards exited the so-called Dark Ages.