Når der er knaphed på ressourcerne, er tvangen til innovation altid væsentligt større, end når man lever i overflod og ikke behøver at bekymre sig om, hvordan energien og andre ressourcer anvendes.
When resources were scarce the pressure to innovate was always considerably greater than when we could rely on having a plentiful supply and did not have to concern ourselves with how energy and other resources were used.