Why did increasingly complex societies develop formal schools and specialist teachers?

As societies grew more complex, the development of formal schools and specialist teachers became necessary to manage the transmission of specialized knowledge and maintain social order. The emergence of these institutions was driven by several key factors:

• The Rise of Literacy: As writing systems evolved, literacy became a critical skill for administrative, religious, and legal functions. Because literacy is largely dependent on systematic instruction rather than informal learning, schools developed concurrently with writing systems to teach individuals how to read, write, and interpret complex texts.1
• Specialized Knowledge: Complex societies required experts in fields such as science, mathematics, and law. Formal schools, often managed by intellectual elites like priests in ancient Egypt, were established to preserve and transmit these specialized bodies of knowledge that could not be easily taught through informal means.21
• Social and Moral Regulation: In many early civilizations, such as North China, formal education served a moral purpose, aiming to instill duty toward the state and maintain harmonious social relations through the study of rituals and music.3
• Standardization: Schools provided a controlled environment where rigid methods, such as drill and memorization, could be applied to ensure uniformity in cultural and intellectual transmission, preventing deviation from established patterns of thought.2