The religion of early Vedic Aryans was primarily centered around the worship of nature and the performance of yajnas (sacrificial rituals), as evidenced in the Vedas, particularly the Rigveda. This belief system reflects their reverence for natural elements like fire (Agni), water (Apah), and the vast sky (Dyaus), which they personified as deities. Yajnas were essential for maintaining cosmic order (Rta) and were seen as a means to invite divine favor, illustrating the integration of spirituality and ecology in early Vedic society, a concept explored in standard UPSC sources like NCERT textbooks on Ancient India.