Between 1347 and 1351, the Black Death killed something like a third to half of Europe's population. That number is so large it tends to get read as pure catastrophe and nothing else — which it was, first and foremost. But historians studying the decades afterward keep landing on an uncomfortable second effect: for the peasants who survived it, the plague was also the best labour market Europe had seen in generations, and feudalism never fully recovered from what that market did to it.
Fewer hands, higher price
Feudal Europe ran on an oversupply of peasant labour tied to the land it worked. Lords didn't need to compete for workers, because there were always more workers than there was work that paid well — that imbalance is a large part of what let serfdom hold. The plague inverted the ratio almost overnight. Fields still needed ploughing, harvests still needed bringing in, and suddenly there weren't enough living people to do either. Surviving labourers found they could leave a bad lord for a better wage somewhere else, because for the first time there was somewhere else that wanted them badly enough to offer one.
Lords tried to legislate the shortage away. England's Statute of Labourers, passed in 1351, tried to freeze wages at pre-plague levels and criminalise refusing available work — an attempt to outlaw the labour market's own response to having fewer workers in it. It didn't hold. Wages that had been frozen by law kept rising in practice, because a labourer who could walk to the next manor and get paid more had very little reason to obey a statute the lord issuing it couldn't actually enforce at scale.
A crack, not a collapse
None of this dismantled feudalism in one generation — serfdom persisted in parts of Europe for centuries afterward, and Eastern Europe in particular saw lords tighten control rather than loosen it, going the opposite direction from England and Western Europe. What the plague did was demonstrate, in a way petitions and peasant revolts hadn't managed to on their own, that the system's grip depended on a labour surplus that could not be assumed permanent. Once that assumption cracked, it stayed cracked even after population levels slowly recovered over the following century.
What we're still unsure about
It's tempting to hand the Black Death sole credit for the end of feudalism, and that's more certainty than the history supports. Population pressure, urbanisation, the growth of a money economy, and later the printing press were all already reshaping medieval society before and after 1347; the plague accelerated a shift already underway rather than starting one from nothing. How much of the credit belongs to the plague specifically, versus trends it simply sped up, is still genuinely argued over by economic historians — this isn't a settled ratio, and a post that assigned one would be overclaiming.
This sits inside The Black Death & Its Consequences, one of eight topics in Medieval History, one of seven domains in History, one of seventeen subjects the app can quiz you on.