As it says in the "long" text...... just get a group and do it. The governments will likely attack you and you can use that to topple all of them (or eventually make it too much trouble to attack)
"how do you plan to run society"
I don't, end of story.
how would it run itself? Most likely horizontal leadership at the basic town or facility level
Okay so complete decentralization. I just dont understand how many decentralized towns would be able to run projects like railway building and running nasa. Wouldnt that need some kind of centralize entity that can organize the "big" projects and organs in society?
And for defense. Do you believe in some kind of guerilla defense or..? Because if its centrally organized to defend the land, its called a state. The marxist definition of a state is basically organized monopoly in violence (military and police).
A big project doesn't need a centralized government. A big project would benefit everyone so many towns or individual people would allocate extra resources to any projects they like.
and a military is not needed