Feudalism was a social, political, and economic system that dominated medieval Europe, particularly from the 9th to the 15th century. Its structure was based on the exchange of land for loyalty, military service, and labor. At its core, feudalism established a hierarchical order in which the king, or monarch, granted land, known as fiefs, to vassals (nobles) in exchange for their service. In turn, these vassals would grant portions of their land to serfs or peasants, who worked the land in return for protection and sustenance. This land-based economy was highly localized, with power concentrated in the hands of a few, and much of daily life revolved around agricultural production.

The decline of feudalism did not happen overnight but was a gradual process influenced by several interconnected factors. Key to its decline was the increasing centralization of power by monarchs. As monarchs gained more control, often through military conquest or strategic marriages, they began to diminish the power of feudal lords. This shift marked the beginning of the nation-state as a powerful political entity, replacing the decentralized feudal system. Additionally, the rise of a money-based economy undermined the land-based economy that feudalism relied upon. The growth of trade, the development of markets, and the emergence of a merchant class further destabilized feudal structures.

Another critical event in the decline of feudalism was the Black Death in the 14th century. The plague decimated large portions of Europe's population, resulting in severe labor shortages. This, in turn, weakened the traditional feudal relationships between lords and serfs. With fewer workers available, peasants were able to demand better conditions, higher wages, or even freedom from their obligations. This shift in labor dynamics helped to weaken the power of feudal lords, who could no longer rely on a subjugated, large labor force to maintain their estates.