Sam Sullivan answers the question. He makes the case in favour of density, and against sprawl; envisioning a fourth wave of urban reform.
Why? Just a few things — reduced energy use; reduced land user per person; economics; housing prices; cost reduction; plus a host of others.
Thanks for the tip to Lynn Zanatta from the Global Civic Policy Society.
This case has been made many times over. The challenge, as any municipal politician knows, is in the doing of it.