upgrowth

noun

1. The process or result of growing up; progress; development.

   “The thorough and shameless commercialism of Sex has alas! been reserved for what is called "Christian civilization," and with it (perhaps as a necessary consequence) Prostitution and Syphilis have grown into appalling evils, accompanied by a gigantic degradation of social standards, and upgrowth of petty Philistinism and niaiserie.”

   “the new and mighty upgrowth of poetry in Italy”