Why does ancient Persia no longer exist?

Answer 1

Ancient Persia, once a powerful empire known for its vast territory and cultural achievements, ceased to exist primarily due to a series of invasions and conquests, most notably by Alexander the great in the 4th century BCE. Following Alexander's death, the region fragmented into smaller kingdoms, eventually being absorbed by the Roman Empire and later the Islamic conquests in the 7th century CE. These events led to significant cultural and political transformations, ultimately resulting in the emergence of modern Iran, which, while sharing historical roots, is distinct from ancient Persia.