The Persians are an Iranian ethnic group that make up over half the population of Iran.They share a common cultural system and are native speakers of the Persian language,as well as closely related languages.The ancient Persians were a nomadic branch of the ancient Iranian population that entered the territory of modern-day Iran by the early 10th century BC. Together with their compatriot allies, they established and ruled some of the world's most powerful empires,well-recognized for their massive cultural, political, and social influence covering much of the territory and population of the ancient world.Throughout history, the Persians have contributed greatly to various forms of art and science, and own one of the world's most prominent literatures.source:wikipedia