“Behind every modern man are 200 energy slaves”, a calculation attributed to Buckminster Fuller and others. You calculate the per capita energy usage divided by

“Behind every modern man are 200 energy slaves”, a calculation attributed to Buckminster Fuller and others. You calculate the per capita energy usage divided by a humans daily caloric intake (on human labor eqivalent) to estimate an energy slave count. 3/4ths of the energy comes from fossil fuels which has been storing solar energy for hundreds of thousands of years. Technologynthat harnesses energy creates much of modern GDP. I doubt we will ever sink back to the lows where as much as 2/3rds the population is slave labor to a ruling class (Rome, Vikings, US South). When fossil fuels become too expensive, we’ll have figured out how to have gotten more efficiency out ofbthe remaing 50 renewable energy slaves.