What is the manifestation of inequality between people?

Inequality between people began to manifest itself in the primitive world. The reason for the emergence of wealthy and poor people was the difference in spheres of activity. Hunters, chieftains, and elders received more benefits because they were doing more responsible work. Inequality also existed in a slave society. The feudal regime was also built on the relationship between rich feudal lords and poor workers. The same trend is observed in the capitalist system. Someone has more capital, and someone less.