This is actually exactly how we govern ourselves now in most of our daily life. Every family group has its own social contract, we all belong to community, international and global user groups, and we all access the local and global commons. This is a picture of society as it exists in reality, without the arbitrary and unnecessary state cages. If we had governance by user group, and every user group was open to anyone who agreed to community consensus, there would be no purpose for states. Instead of being governed in arbitrary boxes by land mass, we would be able to travel freely among overlapping rings by function.
Source : https://georgiebc.wordpress.com/