Where did Tarim mummies come from ?

In 1995, Mair claims that "the earliest mummies in the Tarim Basin were exclusively Caucasoid, or Europoid" with east Asian migrants arriving in the eastern portions of the Tarim Basin around 3,000 years ago while the Uyghur peoples arrived around the year 842.

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.

b) race riots in several cities