Answer:
Feudalism is the denomination of the predominant political system in Western Europe of the central centuries of the Middle Ages (between the ninth and fifteenth centuries, although there is no agreement among historians about its beginning and its duration, and this varies by region), and in Eastern Europe during the Modern Age, characterized by the decentralization of political power; to be based on the diffusion of power from the cusp (where in theory the emperor or the kings were) towards the base where local power was effectively exercised with great autonomy or independence by an aristocracy, called nobility, whose titles derived from governors of the Carolingian empire (dukes, marquises, counts) or had another origin (barons, knights, etc).
As an economic-social formation, feudalism began in late Antiquity with the transition from slavery to feudal mode of production, starting with the crisis of the third century and, above all, with the dissolution of the Roman Empire of the West (5th century) and the formation of the Germanic kingdoms and the Carolingian Empire (8th and 9th centuries).