1. It is arguable whether Jain dharma was a later religion to Vedic era; roots of Shramana might go back to Indus Valley cultures in the yogic tradition of which there is evidence in the seals unearthed (even though Pakistan claims Mohenjo-daro to be their ancestral culture) ; Yoga was incorporated into Brahmanism around when Buddhism adopted yoga and tantra from Shramanic roots. 2. In the cosmogenic hymns in RigVeda like Nasadiyasukta, Purushasukta, etc etc.. you get some philosophical smatterings, but more in the Brahmanas, followed by Upanishads. Vedic religion never disappeared; the Mimamsa defended it as Shruti, and samskaras continued these as well as homa sacrifice practices, later by Arya Samaj. More alive in the southern Indian practices of Brahmanic dharam. Your coverage is too cursory, it lacks references to contemporary scholarship (some if not most of it Western, but persuasive). You don't say where Vedic practices, older form of Sanskrit, and uniconic deification of natural elements came from --- possible Central Asian Aryan roots or Indo-Iranian?
1. It is arguable whether Jain dharma was a later religion to Vedic era; roots of Shramana might go back to Indus Valley cultures in the yogic tradition of which there is evidence in the seals unearthed (even though Pakistan claims Mohenjo-daro to be their ancestral culture) ; Yoga was incorporated into Brahmanism around when Buddhism adopted yoga and tantra from Shramanic roots. 2. In the cosmogenic hymns in RigVeda like Nasadiyasukta, Purushasukta, etc etc.. you get some philosophical smatterings, but more in the Brahmanas, followed by Upanishads. Vedic religion never disappeared; the Mimamsa defended it as Shruti, and samskaras continued these as well as homa sacrifice practices, later by Arya Samaj. More alive in the southern Indian practices of Brahmanic dharam. Your coverage is too cursory, it lacks references to contemporary scholarship (some if not most of it Western, but persuasive). You don't say where Vedic practices, older form of Sanskrit, and uniconic deification of natural elements came from --- possible Central Asian Aryan roots or Indo-Iranian?