I know this isn't the one but I remember reading a science fiction story that talked about how Earth got overcrowded and the only solution was to keep building taller and taller skyscrapers.
The novel was by Robert Silverberg. I forget the title. People in the arcologies reproduced freely. People in the agricultural lands that fed the arcologies had not-nice ways of limiting population (IRRC, YMMV).
The novel was by Robert Silverberg. I forget the title. People in the arcologies reproduced freely. People in the agricultural lands that fed the arcologies had not-nice ways of limiting population (IRRC, YMMV).
Robert Silverberg, "The World Inside"