Not much of a "city", it appears: https://www.google.com/maps/place/Arcosanti,+AZ+86333/@34.3427946,-112.1015342,283m/data=!3m1!1e3!4m5!3m4!1s0x872cef0edebffb03

Not much of a "city", it appears: https://www.google.com/maps/place/Arcosanti,+AZ+86333/@34.3427946,-112.1015342,283m/data=!3m1!1e3!4m5!3m4!1s0x872cef0edebffb03:0x68c31f0f2107d029!8m2!3d34.3425315!4d-112.1005547 https://www.google.com/maps/place/Arcosanti,+AZ+86333/@34.34... I'm not dismissing the idea at all; I'd just like to point out that a lot of the problems we see currently in cities are caused by the presence of a larger number of people.