I was looking through Permaculture One the other day at a friend's house. It was written in 1978 (I think) and was essentially the thesis that came from David Holmgren (student) working with Bill Mollison (mentor/tutor).
It is Permaculture's first book.
In about the second paragraph there is a mention about how this concept is to prepare for our 'fast-depleting energy'.
Way back then, the warnings were there to prepare for a decline in energy production - very few listened.
I'll be interested in seeing how the current oil/energy crisis will affect the popularity of permaculture.
Will we have groups forming everywhere like mushrooms?
Will there be a huge increase in demand for permaculture skills?
Will there be a huge rise in the number of people doing PDCs?
Will we see a weekly tv show called 'Permablitz' where people have their backyards made over into food producing cornucopias?
I'll wait and watch from the vegie patch me thinks!