Answer :

. Basically what it did was to decrease the number of peasants who were forced to work on the landed people's property for very low wages. After the plague, there was a build up in the middle class as the peasants, now in short supply, could bargain for higher wages so, in turn, prices of farm goods increased, but the peasants got more status.
shindosaulong
The black death wiped out 30 to 50% of the world's population. Keep in mind that there weren't as many people on earth to begin with so less people died but more of the population. 

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