“Mechanization, the harnessing of energy, is man's answer to slavery” –Buckminster Fuller

Map from 1940, when the world had just over 2 billion people, and machines doing the energy equivalent of 37 billion people's worth of work for them:

Image from: https://www.fulltable.com/vts/f/fortune/xb/50.jpg

Sourced via Wikipedia: https://en.wikipedia.org/wiki/Energy_slave

Founder, The Roots of Progress (rootsofprogress.org). On book-writing sabbatical, trying not to check social media including DMs