It wasn't really until the 19th century that it was re-translated and the connection to other indo-european cultures and pantheons was rediscovered.
It wasn't really until the 19th century that it was re-translated and the connection to other indo-european cultures and pantheons was rediscovered.
> It is unclear as to when the Rigveda was first written down. The oldest surviving manuscripts have been discovered in Nepal and date to c. 1040 CE.[3][78] According to Witzel, the Paippalada Samhita tradition points to written manuscripts c. 800–1000 CE.[79] The Upanishads were likely in the written form earlier, about mid-1st millennium CE (Gupta Empire period).[33][80] Attempts to write the Vedas may have been made "towards the end of the 1st millennium BCE". The early attempts may have been unsuccessful given the Smriti rules that forbade the writing down the Vedas, states Witzel.[33] The oral tradition continued as a means of transmission until modern times.[81]
As I understand it, the Tipitaka, Panini, Patanjali, etc., were also first written down around the end of the first millennium BCE or the beginning of the first millennium CE, as writing was adopted relatively late in India.
But actually there are rather solid reasons for believing that the alterations in the Rig Veda over the last 3000 years have been minimal, going far beyond what is commonly described as "pure speculation". Some of them have been described already in this thread, but there is an extensive academic literature on the topic, much of it linked from the Wikipedia article you started reading.
You had several priestly functions, like the Hotar, who recites the invocations of the Veda, and there is also the Brahman. The Brahman checks if everything is done to precision and no mistakes are made. If there are, they need to do corrections.
This is another reason why one can say it has been passed down without much change. There is a critical edition by scholars that reconstructs the changes in meter that might have occurred, but nothing else.
Any recommendations for an overview of the field?
A bit more classical but thorough is a History of India by Herman Kulke and Dietmar Rothermund.
And the best one to go into detail is “The Rigveda : a guide” by Joel P Brereton & Stephanie W Jameson.