Smaller groups can organize and as they do, become more forceful for change. The rise of terrorism, against established states, shows a glimpse of the future. It would have been unthinkable that a group of terrorists could forestall the wishes of a super-power such as ours in the past.
Now we have them in our midst and they have options to communicate and plan attacks. If we have so much trouble containing them, how could a global governance hope to control? The world will be a mass of small groups and their peculiarities rather than a global behemoth. We are divided as never before in our country, this is happening all over the world.
The future will be more war-like as these different groups seek tribal and ethnic community. The end result will be more freedom and independence for all people but a pain for those trying to maintain nation status. The fifteenth century established the nation state and it has endured for five hundred years. This century will see the dismantling of centralized governance and smaller units of government established. My tinfoil hat is screwed down, flame away.