The Indo-Iranian peoples are a group of ethnicities and cultures that speak languages belonging to the Indo-Iranian branch of the Indo-European language family. This group primarily includes the Indo-Aryans, who are mainly found in India and Pakistan, and the Iranian peoples, who inhabit Iran and surrounding regions. Their languages, such as Hindi, Bengali, and Persian, share common roots and have influenced each other over centuries. Historically, the Indo-Iranian peoples have played significant roles in the development of civilizations in South Asia and Iran. They have contributed to various fields, including literature, philosophy, and religion, with notable texts like the Vedas in Hinduism and the Avesta in Zoroastrianism. Their rich cultural heritage continues to shape the identities of millions today.