Leftimies
Dwelling in the Principle
PIE was spoken about 6,000 years ago around the Black Sea area. Within the next few thousand years it diverged going west into Europe and south into the Iranian plateau and Indian subcontinent.
It took about 1,000 years for PIE to change into Proto-Indo-Iranian, and another 1,000 years for Proto-Indo-Iranian to split into the Iranian languages and Vedic Sanskrit. Proto-Greek appeared about the same time. So when all is said and done, between about 4000 BCE and 2000 BCE we have PIE splitting into most of its daughter languages. It was actually pretty fast.
Thats incredible. I was prepared for something much longer. So, going forth with that 6,000 mark, basically the Proto-Indo-European culture (which was supposedly loosely shared by the members of the group who spoke the PIE language) existed at the same time when the early Chinese culture was taking shape. So it really is that recent, that's actually quite profound. That explains why the traces of PIE culture are so strong and mutually shared by pre-Christian Europeans, pre-Islamic Persians and the Indians (particularly in linguistics, religions and philosophy).