The World Inside
Robert Silverberg
 War, starvation, crime and birth control have been eliminated. Life is now totally fulfilled and sustained within Urban Monads (Urbmons), mammoth thousand-floor skyscrapers arranged in "constellations", where the shadow of one building does not fall upon another. An Urbmon is divided into 25 self-contained "cities" of 40 floors each, in ascending order of status, with administrators occupying the highest level. Each building can hold approximately 800,000 people, with excess population totalling three billion a year transferred to new Urbmons, which are continually under construction. The Urbmon population is supported by the conversion of all of the Earth's habitable land area not taken up by Urbmons to agriculture. The theoretical limit of the population supported by this arrangement is estimated to be 200 billion. The farmers live a very different lifestyle, with strict birth control. Farmers trade their produce for technology and the two societies rarely have direct contact; even their languages are mutually unintelligible. The Urbmons are a world of total sexual license where men are expected to engage in "night walking"; it is considered a capital crime to refuse an invitation for sex. In this world it is a blessing to have children: most people are married at 12 and parents at 14. Just thinking of controlling families is considered a faux pas. Privacy has been dispensed with due to the limited area. Because the need to be outdoors and to travel has been eliminated, thoughts of wanderlust are considered perverse. The dwellers of the Urban Monad share scant resources and believe that sharing of everything is required in order for people to peacefully co-exist in close quarters. The sharing extends to wives and husbands, a sentiment likely springing from the free love movement of the mid-to-late Twentieth century. Although great effort is spent to maintain a stable society, the Urban Monad lifestyle causes mental illness in a small percentage of people, and this fate befalls two of the book's main characters. "Social engineers" reprogram those who are approaching an unacceptable level of behavior. Given the extremes of life in the Urban Monads, law enforcement and the concept of justice employ a zero tolerance policy. There are usually no trials, and punishment is swift; anyone who threatens the stability of the Urbmon society (a "flippo") is "erased" by being thrown into a shaft that terminates in the building's power generator. This gives one of the book's characters the idea that humanity has been selectively bred for life within the Urbmons.