This multidisciplinary study investigates the thesis that the Hazara people of central Afghanistan are the direct biological and cultural descendants of the populations that inhabited the core sacred geography of the Avesta, the primary collection of Zoroastrian texts. By integrating genetic, linguistic, archaeological, and historical evidence, this study demonstrates an unbroken chain linking:- Ahura Mazda (the Zoroastrian supreme deity)- Arəzahī (the eastern clime/karshvar)- Harā Bərəzaitī (the world-axis mountain)- Haētumant (the sacred Helmand River)- Zarathushtra (the prophet)- Airyanem Vaejah (the original homeland of the Aryans) This chain extends to the Middle Persian term Arzah and, critically, to the modern Hazaragi self-designation Āzrah and the region of Azrah-jat (Hazarajat). Key evidence includes:1. Linguistic: The Hazaragi self-name Āzrah derives directly from Avestan Arəzahī (c. 1700-1200 BCE) through regular phonological changes, with no Mongol or Turkic etymology.2. Genetic: Y-chromosome data (Di Cristofaro et al., 2013) shows a pre-Mongol Iranian substrate in Hazaras (J2a1-Page55 at 13%, G2 at 8.7%, together ~22%).3. Geographic: The source of the Helmand River is the Koh-i Baba range in the heart of today's Hazarajat, matching the Avestan description of Harā Bərəzaitī.4. Archaeological: The Helmand Civilization (c. 3300-2350 BCE) flourished in this same basin.5. Historical: Xuanzang (646 CE) recorded monks named Āryadāsa and Āryasēna in Bamiyan, proving Aryan self-identification before the Mongol conquests. The study concludes that the Hazara are not a post-Mongol intrusion but the indigenous inheritors of the core sacred geography and early Iranian civilization, with roots extending back more than 3,500 years. Their name, Āzrah, is a living testament to their origins in the Avestan land "created from light." This document is available in English and Persian (Dari). For other languages, use your browser's translate feature.