A central and repeatedly stated assertion of the two Quinn books I read is that at some time humans lived in a stable equilibrium. That is not a worldview, that is an assertion of fact. A particular fact that is problematic in proving, yet Quinn claims to know it is true. He actually waters it down at one point and says that human population did grow steadily before some arbitrary level of agricultural innovation, but that it was slower than in recent times. My question is: Why should I believe that modern humans ever existed in a stable equilibrium? I believe that the growth rate has not been constant, yet how could I know that the early history of humans is fundamentally different from exponential growth in which growth is relatively slow for a long time early on? • Ishmael.org, the work & philosophy of Daniel Quinn