I don't see globalization as the cause, hence I don't think decentralization in and by itself, can solve it.

It's more of a systemic change of the world, in response to a unified threat. The result is that homogenous human structures can no longer be defined in terms of "state", or "countries". These structures have been obsoleted and there are now only two directions, two consistent tendencies, which are stretching over any previous administrative definitions. At least that's what I see, I may be wrong, obviously.