A Talk with Robert Trivers, Introduction by Steven Pinker

Steven Pinker on Robert Trivers:

I'm very pleased to hear that Edge is having an event highlighting the work of Robert Trivers on deceit and self-deception. I consider Trivers one of the great thinkers in the history of Western thought. It would not be too much of an exaggeration to say that he has provided a scientific explanation for the human condition: the intricately complicated and endlessly fascinating relationships that bind us to one another.

In an astonishing burst of creative brilliance, Trivers wrote a series of papers in the early 1970s that explained each of the five major kinds of human relationships: male with female, parent with child, sibling with sibling, acquaintance with acquaintance, and a person with himself or herself. In the first three cases Trivers pointed out that the partial overlap of genetic interests between individuals should, according to evolutionary biology, put them in a conflict of psychological interest as well. The love of parents, siblings, and spouses should be deep and powerful but not unmeasured, and there should be circumstances in which their interests diverge and the result is psychological conflict. In the fourth case Trivers pointed out that cooperation between nonrelatives can arise only if they are outfitted with certain cognitive abilities (an ability to recognize individuals and remember what they have done) and certain emotions (guilt, shame, gratitude, sympathy, trust)—the core of the moral sense. In the fifth case Trivers pointed out that all of us have a motive to portray ourselves as more honorable than we really are, and that since the best liar is the one who believes his own lies, the mind should be "designed" by natural selection to deceive itself.

More here by Pinker, and Trivers's talk "A Full-force Storm With Gale Winds Blowing".