What did the social class with the largest number of people contribute to early civilizations?

The social class with the largest number of people in early civilizations, often comprised of farmers and laborers, contributed significantly to agricultural production and the stability of food supplies. Their work enabled the growth of cities and the development of trade, as surplus crops could be exchanged for other goods. Additionally, this class provided the manpower for construction projects, infrastructure development, and the maintenance of societies, facilitating advancements in culture and governance. Ultimately, their contributions laid the foundation for complex societal structures and economic systems.