Final answer:
Modern advocates oppose feudal systems because they restrict social mobility and cement inequality. The feudal structure maintained a rigid hierarchy with immobile serfs bound to work lands owned by a few, creating significant class disparity. Industrial society and technological advancements offered alternative paths to mobility, leading to feudalism's decline.
Step-by-step explanation:
Modern human and social service advocates argue against feudal structures in societies mainly because feudal systems inherently limit social mobility and perpetuate inequality. The feudal structure was characterized by its rigidity and a strict hierarchy that bound peasants to the land under the domain of landlords and nobility, known as lords. This system provided very little opportunity for those at the bottom to improve their status, as land ownership and wealth were concentrated in the hands of a few, creating a significant disparity between classes.
Throughout the Medieval period, those at the bottom, like serfs and peasants, had to work the land and pay rent in the form of labor, often keeping them in a state of dependency and servitude. In contrast, lords owned large estates and granted fiefs to vassals, who pledged their loyalty and military service in exchange for a piece of land to cultivate. However, the transition to industrial society and the technological advances of the Industrial Revolution created new means of wealth and paths to social mobility, contributing to the decline of the feudal system.