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Part One: Chapters 1-4

• The following version of this book was used to create this Lesson Plan: Harari, Yuval Noah. Sapiens. 2015. Harper Perennial, E-book.

• If different groups of sapiens interbred with different human species, their modern descendants would have significant genetic differences.

• The controversial nature of this questions makes many reluctant to answer it, though Harari concludes that sapiens likely engaged in some interbreeding, but mostly replaced their human cousins.

• It is also unknown whether sapiens engaged in all out genocide of other humans, or whether their spread was a more gradual, passive process.

• In any case, Harari states that sapiens conquered the world because of our unique language.

• Chapter 2 details the Cognitive Revolution, which occurred between 70,000 and 30,000 years ago.

• Sapiens first appeared on the planet 150,000 years ago but did not spread significantly until 70,000 years ago.

• In the interim, we were just one of the many human species...

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