This is still entirely a matter of speculation. The old theory of Central Asia as the “Cradle of Mankind” was based on false premises, which have been abandoned.
From the distribution of the living and fossil great apes, it is thought that Man’s divergence from the general anthropoid stem is likely to have taken place somewhere in the area comprising western Europe, the northern half of Africa, and southern Asia, with the preference perhaps slightly in favor of Africa or Asia, but there is no real evidence at present to warrant a final conclusion.