I think that there should be many squares - many should be local to geography, interests, etc. Freedom of association is involved in choices. Describing a public square as an idea - is never what it is in reality. Allot of what Musk and others are from the point of view - self determination is a right of communities, localities or those who are effected - I think ways to resolve conflicts is important, but having imposing same on everyone - because 100,000,000 people voted one way or another; truth is for people to live in democracy - local determination is essential; groups who want to control others resources, decisions, or freedoms are inherently abusive. Political parties are a prime example of this. Musk is driven by books he read as a child, something's insightful others - humanity would survive if not ruled by a centralized galactic core - a very driven person. I would like to see expand, explore, etc .. Socialist think that they know best for everyone, I believe in private ownership local control, using technology to break interdepence - not making dependence a freeman has a plow and a mule, others have nothing and work for someone who has a monopoly of resources and power or a state which has a monopoly on resources and power. I like some of Jack's and Musk's ideas but as individuals and communities we need to think deeper and know reality is very unforgiving but can be very rewarding.