The emergence of __________ in agrarian societies marked the first significant social inequality, distinguishing roles such as serfs and nobles.

The emergence of social classes in agrarian societies marked the first significant social inequality. In these societies, people began to take on different roles based on their wealth and land ownership. For example, nobles owned large amounts of land and had power, while serfs worked the land for them and had very few rights. This division created a clear hierarchy, where nobles controlled resources and made important decisions, while serfs had to work hard just to survive. As a result, social inequality became a key feature of these early agricultural communities.