[LucasCollecchia]

Trends in property law and home ownership in urban areas seem to indicate that as rules and safeguards are developed for sharing more effectively, the rate of sharing increases dramatically.

Condominiums, for instance, seem like a crazy type of building if your system of land ownership is feudal, but they're a practical necessity if property value skyrockets and more population housing is needed in a dense area.

One of the main shifts in social structure occurred around the 1890s to 1920s, and was largely predicated on the difficulty associated with sharing issues in urban life, and the lack of rules to mediate that type of space sharing. Debates at the time about how to accommodate these issues were rather fierce, but mostly forgotten now. Our current laws regarding nuisance and abuse of rights are both hacks of the property system to make urban life work. Karl Polanyi's Great Transformation is a fantastic book which recounts the shift, if anyone is interested.

I'm interested in seeing what types of norms and rules would need to exist in order to fulfill the infrastructure requirement that you mention. Additionally, I wonder if certain areas of the world are already normatively primed for sharing, and whether or not they could become springboards for a more global shift.