But perhaps we really don't want to know the answers to these questions. We should not despise the desire to be kept in ignorance--aren't there many facts about yourself and your loved ones that you would wisely choose not to know? Speaking for myself, I am sure that I would go to some lengths to prevent myself from learning all the secrets of those around me--whom they found disgusting, whom they secretly adored, what crimes and follies they had committed, or (...) thought I had committed! Learning all these facts would destroy my composure, cripple my attitude towards those around me. Perhaps learning too much about our animal cousins would have a similarly poisonous effect on our relations with them. But if so, then let's make a frank declaration to that effect and drop the topic, instead of pursuing any further the pathetic course many are now embarked upon. (shrink)

Cooperative animals often find themselves in situations in which they need to monitor and compare pay-offs received from joint ventures. They can compare their pay-offs with a) the history of giving to and receiving from the same partner, b) the effort they put into the venture, or c) what others are getting. There is ample observational evidence that monkeys and apes follow rules of social reciprocity. There is also evidence for market effects of supply and demand. In a series of (...) experiments we have further shown that monkeys show payment for labor and reject income inequality. The latter finding, first reported by Brosnan & de Waal, is directly relevant to the origin of the human sense of fairness. I will discuss how the two relate. (shrink)