I'm a liberal anarchist at heart, but i well know how idealistic it is to believe that humanity would last long without a governmental structure, at least for now. 

Surprisingly, my most favored form of authority would be something along the lines of a constitutional monarchy. I very much fancy the idea that the person in charge will be somebody who had been brought up to be prepared for the task since their very childhood. 

But then again, i never looked in to the subject matter too much, so my opinion is quite the shallow one.