Sorry for the long delay. I have a lot more to write about but still doing research including research on religion and philosophy, continued research into critical thinking, behavior economics, comparative economics, sociology, political systems, and agriculture, transportation, so on.
I don’t spend a lot of time thinking about where it should go since a cognitopia anywhere is still a cognitopia but here is my thinking.
I would love to see New Alexandria on an island, specifically Kanacea in Fiji’s Lau archipelago which is for sale for about 10 million (last i checked). It is large enough for a small city and has a mountainous terrain which could protect against severe storms from climate change and provide high ground when the sea level rises. I feel that the logistics of such a thing and the lack of infrastructure might be too difficult to overcome, but it's a candidate.
Another location is somewhere in northern Canada which has a lot of land and will be less impacted by global warming. In addition, Canada has an existing legal system and defences which are important to protect New Alexandria against internal crime as well as threats from abroad. A while back a group occupied an old abandoned military structure in neutral waters and declared it a libertarian nation. Shortly there after it was overrun by another group who invaded the facility and drove the original inhabitants away.
In all cases, I think New Alexandria would start out as an employee owned corporation in a stable nation, which avoids issues with attempting to get sovereignty — nearly impossible — and allows for more discretion of population and political infrastructure. In this scenario, which seems the most likely to work, the employees are basically the citizens who would live and work on “campus”.