> The former is particularly easy, because we've had the technology to build multiple housing units on a given parcel of land by stacking the units on top of ea

> The former is particularly easy, because we've had the technology to build multiple housing units on a given parcel of land by stacking the units on top of each other for at least two centuries. The UK is still scarred from the last time it tried highly dense housing - people think of failed developments such as Hulme Crescents: https://www.youtube.com/watch?v=S1qpf9hogI0 https://www.youtube.com/watch?v=S1qpf9hogI0 https://en.wikipedia.org/wiki/Hulme_Crescents https://en.wikipedia.org/wiki/Hulme_Crescents