The beauty of your statement is that it will become more and more provable through fine grained DNA analysis. The history of Neolithic Europe has been determine

The beauty of your statement is that it will become more and more provable through fine grained DNA analysis. The history of Neolithic Europe has been determined by recent (<10 years) results of multiple waves (almost) repopulating the old hunter gatherer stocks. There may grow a new school of linguists who deeply incorporate these waves with layers of language. Interestingly the arrival of horses, chariots and advanced metallurgy in China did not leave much of an impression on the gene pool, at least not detected (detectable?) by current data/methods.