Actually naturism or Nudism was at one time also called Gymnosophy (I think I spelled that right) and has been practiced since 1930...in America (Stripping away the unnecessary and exposing the bare facts about the raw nature of the human experience.).
But I am sure the practice and the underlying philosophy(s) go back even further.

For every radical there will be at least as many Puritans more than willing to punish and or dress them. :)