Which group of people made up the largest group in European fedual society?

The largest group in European feudal society was the peasantry, which included serfs and free peasants. Serfs, who were bound to the land and worked for the lords, made up the bulk of the rural population and were responsible for agricultural production. Free peasants, while having more rights and autonomy, also constituted a significant portion of the population. Together, these groups formed the foundation of the feudal economy and society.