Dr. David Fleming (1940 – 2010) was a visionary thinker and writer who played significant roles in the genesis of the UK Green Party, the Transition Towns movement, and the New Economics Foundation, as well as chairing the Soil Association. He was also one of the early whistle-blowers on oil depletion and designer of the influential TEQs carbon/energy rationing system. He read Modern History at Trinity College, Oxford, and later earned an MBA and then an MSc and PhD in economics (in 1988). These enabled him to better engage with and confound the mainstream, in support of his true passion and genius: understanding that diverse and mysterious thing “community.” Lean Logic was the work of over thirty years.