There is a book by Thomas McEvilley called "The Shape of Ancient Thought" which traces developments in Indian and Greek philosophy in parallel, and shows many similarities between the views of the Greek thinkers and views found in the different Upanishads and later Indian texts. I am not sure how "mainstream" McEvilley's views are in the Academy, but at least the similarities seemed striking to me, whatever one makes of his interpretation of Greek thought being influenced by Indian thought earlier (and vice versa later in time).
I have studied many of the ancient Indian works, and I can certainly say that there is a lot of philosophy in them.
The Shape of Ancient Thought
Excellent series!
There is a book by Thomas McEvilley called "The Shape of Ancient Thought" which traces developments in Indian and Greek philosophy in parallel, and shows many similarities between the views of the Greek thinkers and views found in the different Upanishads and later Indian texts. I am not sure how "mainstream" McEvilley's views are in the Academy, but at least the similarities seemed striking to me, whatever one makes of his interpretation of Greek thought being influenced by Indian thought earlier (and vice versa later in time).
I have studied many of the ancient Indian works, and I can certainly say that there is a lot of philosophy in them.