Lets assume that mutation rates are not static, which is probably true.
Judging by the distribution of different R1b branches, we see the first bifurcation of R1b is that of V88 into Africa.
So it makes sense that expanded from Egypt or the Sea Peoples Palestine.
Then the Z2103 went into Greece(also Ukraine) and the M269 went into the Danube and expanded in the European continent.
The geographic distribution supports my theory.
NOTE: this is apart from the fact that haplogroup R1 comes from Siberia.
But a lot of their evolution seems to have occurred in the West.
Judging by the distribution of different R1b branches, we see the first bifurcation of R1b is that of V88 into Africa.
So it makes sense that expanded from Egypt or the Sea Peoples Palestine.
Then the Z2103 went into Greece(also Ukraine) and the M269 went into the Danube and expanded in the European continent.
The geographic distribution supports my theory.
NOTE: this is apart from the fact that haplogroup R1 comes from Siberia.
But a lot of their evolution seems to have occurred in the West.