Serf (n.) was the bitterest part, but not the whole grievance: the poor had no part nor share in anything.
4 definitions
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Serf (n.) hides the domination of the conditions of production over the producers behind the visible domination of lord over serf — so economic mystification has no room there.
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A Serf (n.) could grow wealthy precisely because custom froze his duty at two days a week while the productivity of his remaining days kept growing.
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Serf (n.) was what remained to peasants ruined by Charlemagne's wars: to exchange the position of debtor for that of serf.