Pockets of humanity have been cut off from contact from others for thousands of years at a time and this physical seperation between populations did not result in speciation.

The administrative seperation within your populations would not have a more marked effect than an actual physical seperation.

Pockets of humanity have been cut off from contact from others for thousands of years at a time and this physical separation between populations did not result in speciation.

The administrative separation within your populations would not have a more marked effect than an actual physical separation.