In Guns, Germs, and Steel, what was the "great leap forward?"

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pohnpei397 | College Teacher | (Level 3) Distinguished Educator

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The answer to this can be found in Chapter 1.  In this context, the term "great leap forward" refers to a time at which human beings (for whatever reason) experienced a dramatic advance in their social development.  This was a time when technology as well as cultural expression grew much more quickly than it ever had to that point.  This happened sometime around 50,000 years before the present.  In a sense, this is when the human species truly became human.  Shortly after this great leap forward, modern human beings began to leave Africa and to colonize the rest of the world.