Why stop there? Trains are only necessary because the density isn’t high enough to walk everywhere. We wouldn’t need them if everyone just lived in the cube[1].

Why stop there? Trains are only necessary because the density isn’t high enough to walk everywhere. We wouldn’t need them if everyone just lived in the cube[1]. [1] https://waitbutwhy.com/2015/03/7-3-billion-people-one-building.html https://waitbutwhy.com/2015/03/7-3-billion-people-one-buildi...