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Chimpanzees have very strong preferences and aversions that are completely personality-linked. The people who are unsuccessful in working with chimpanzees are those who take this personally.
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The sturdiest pillars of human morality are compassion and a sense of justice.
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If you look at human society, it is very easy, of course, to compare our warfare and territoriality with the chimpanzee. But that's only one side of what we do. We also trade, we intermarry, we allow each other to travel through our territory. There's an enormous amount of cooperation.
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Experiments with animals have long been handicapped by our anthropocentric attitude: We often test them in ways that work fine with humans but not so well with other species.
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Dogmatists have one advantage: they are poor listeners.
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To endow animals with human emotions has long been a scientific taboo. But if we do not, we risk missing something fundamental, about both animals and us.
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I am personally not against keeping animals at zoos, as they serve a huge educational purpose, but treating them well and with respect seems the least we could do, and with 'we' I mean not just zoo staff, but most certainly also the public.
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Human morality is unthinkable without empathy.
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I think the sense of fairness in humans is very strongly developed, and that's why we react so strongly to all the bonuses received by Wall Street executives. We want to know why they deserve these benefits.
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I've argued that many of what philosophers call moral sentiments can be seen in other species. In chimpanzees and other animals, you see examples of sympathy, empathy, reciprocity, a willingness to follow social rules. Dogs are a good example of a species that have and obey social rules; that's why we like them so much, even though they're large carnivores.
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If there is any form of contagion that is adaptive, it is the immediate response to the fear of others. If others are fearful, there may be good reason for you to be fearful too.
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Exclusive homosexuality is not very common in nature.
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I was born in Den Bosch, where the painter Hieronymus Bosch named himself after. And so I've always been very fond of this painter who lived and worked in the 15th century.
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Popular culture bombards us with examples of animals being humanized for all sorts of purposes, ranging from education to entertainment to satire to propaganda. Walt Disney, for example, made us forget that Mickey is a mouse, and Donald a duck. George Orwell laid a cover of human societal ills over a population of livestock.
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I was too restless as a boy to sit through an entire mass. It was akin to aversion training. I looked at it like a puppet show with a totally predictable story line. The only aspect I really liked was the music.
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Our brains have been designed to blur the line between self and other. It is an ancient neural circuitry that marks every mammal, from mouse to elephant.
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Future benefits rarely figure in the minds of animals.
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Science is not inherently good.
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The intuitive connection children feel with animals can be a tremendous source of joy. The unconditional love received from pets, and the lack of artifice in the relationship, contrast sharply with the much trickier dealings with members of their own species.
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It is well known that apes in the wild offer spontaneous assistance to each other, defending against leopards, say, or consoling distressed companions with tender embraces.
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When humans behave murderously, such as inflicting senseless slaughter of innocents in warfare, we like to blame it on some dark, 'animalistic' instinct.
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I describe in 'Chimpanzee Politics' how the alpha male needs broad support to reach the top spot. He needs some close allies and he needs many group members to be on his side.
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Humans have a lot of pro-social tendencies.
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War is evitable if conditions are such that the costs of making war are higher than the benefits.