Why would it have been impossible for Ashoka to spread Buddhist values before about 528 b.c.e.?

Before 528 BCE, Ashoka could not have spread Buddhist values effectively because Buddhism itself was not yet established as a distinct religion; it emerged around the 5th century BCE with the teachings of Siddhartha Gautama, the Buddha. Additionally, the socio-political structures in ancient India were not conducive to the widespread dissemination of new ideologies. The absence of a centralized authority, like Ashoka's later Mauryan Empire, further hindered the potential for organized promotion of Buddhist principles. Thus, the historical and cultural context of the time was not ready for such a movement.