"After working out scenarios for satisfying what we considered the two most vital bare maximums-external electric energy and internal food supply-we evolved into some of the possible synergetic scenarios that would result from the first moves. The establishment of bare maximum levels of the above throughout the world would engender the need for bare maximums in housing, medical attention, income, communications and travel."
January 1, 1970
https://en.wikiquote.org/wiki/Buckminster_Fuller