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The human blitzkrieg across America testifies to the incomparable ingenuity and the unsurpassed adaptability of Homo sapiens. No other animal had ever moved into such a huge variety of radically different habitats so quickly, everywhere using virtually the same genes.6
Yuval Noah Harari • Sapiens

Part III is about the third principle: Morality binds and blinds. The central metaphor of these four chapters is that human beings are 90 percent chimp and 10 percent bee. Human nature was produced by natural selection working at two levels simultaneously. Individuals compete with individuals within every group, and we are the descendants of
... See moreJonathan Haidt • The Righteous Mind: Why Good People Are Divided by Politics and Religion
Of course, gifting a daughter or sister not only signaled the conquering ruler’s superiority, it also had the advantage of turning the conquered into long-term clients, at least as long as the marriage lasted. Trying to avoid client status, four of the societies (Egypt, Hawai’i, Aztec, and Inca) eventually opted for royal incest.
Jessica C. Flack • Worlds Hidden in Plain Sight: The Evolving Idea of Complexity at the Santa Fe Institute, 1984–2019 (Compass)
Individual fat-storage capacity seems to be influenced by genetic factors. This is a generalization, but people of Asian descent (for example), tend to have much lower capacity to store fat, on average, than Caucasians.
Peter Attia MD • Outlive: The Science and Art of Longevity

Several types of evidence suggest our pre-agricultural (prehistoric) ancestors lived in groups where most mature individuals would have had several ongoing sexual relationships at any given time. Though often casual, these relationships were not random or meaningless. Quite the opposite: they reinforced crucial social ties holding these highly
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