 Children of Tomorrow

Children of Tomorrow is a 1970 science fiction novel by Canadian-American author A. E. van Vogt.Commander John Lane returns from a ten-year mission in space 
to find that the teenagers of Spaceport City have organized 
themselves into "outfits", well disciplined, non-violent little gangs with their own customs and argot, and that the parent's 
role in teen upbringing has become minimal.