Aryans brought Brahmanism to India.  Many of the ancient gods of the Aryans, such as Agni, Indra, and Soma, have persisted as secondary to the three members of the Trimurti.  The Sethites and their followers like Brahmans of the Hindu faith never entirely lost the Trinity concept revealed by Adam.  Vedism was weakened through rejection of higher truth of the cult of the Aryans. 
Brahmanic philosophy has approximated many of the facts of the universe and has approached numerous cosmic truths, but it has all too often fallen victim to the error of failing to differentiate between the several levels of reality, such as absolute, transcendental, and finite. They also fail in recognize the reality of the soul.  Brahman philosophers elaborate in the concept of impersonal Infinity an abstract and misty vapor concept like the one produced by greeks.  The composite belief of the Brahman-Absolute and the salvationistic gospel of Salem influenced on Taoism. 
While the highest phase of Brahmanism was hardly a religion, it was truly one of the most noble reaches of the mortal mind into the domains of philosophy and metaphysics, and did not stop until it had speculated about almost every phase of theology, but lacked belief in Father and ascendant progression. 
The Brahman caste of teacher-priests assumed control over expanding Vedic ritual.  The Hindu caste system allow to perpetuate the Brahman priests.  Exalted themselves above even their gods in a way not done by any other people.  The premier caste of the teacher-priests are lineal descendants of Sethite priests of the second garden.