Re: "How about we abolish cities, people live in human scale communities where they want, and
And you can have that all, provided you're prepared to carpet bomb every city in a country flat to implement it. that's the dirty little secret of most "utopias," they start with a destructive event on an epic scale.
Not necessarily although we've gone a long way to making that the only option. But let's stop the idea of building houses on "brownfield sites". Brownfield sites are sites where people used to be employed and often within walking distance of simple public transport distance of home. Step one would be to stop change of use of such sites as remain; developers would have to redevelop them as places of employment. Crafty use of business rates could encourage employers to move out of city centres to occupy them. This leaves some vacant space in buildings in the cities. Those spaces then get planning permission for change of use to residential for those who want to work in the remaining in-city businesses.
Draconian? Overblown? No more so than the decades of planning policy that brought about the present mess. Make no mistake about it, the situation we have now has been planned. Not intended but planned.