The evolution of cooperation and altruism--a general framework and a classification of models.

One of the enduring puzzles in biology and the social sciences is the origin and persistence of intraspecific cooperation and altruism in humans and other species. Hundreds of theoretical models have been proposed and there is much confusion about the relationship between these models. To clarify the situation, we developed a synthetic conceptual framework that delineates the conditions necessary for the evolution of altruism and cooperation. We show that at least one of the four following conditions needs to be fulfilled: direct benefits to the focal individual performing a cooperative act; direct or indirect information allowing a better than random guess about whether a given individual will behave cooperatively in repeated reciprocal interactions; preferential interactions between related individuals; and genetic correlation between genes coding for altruism and phenotypic traits that can be identified. When one or more of these conditions are met, altruism or cooperation can evolve if the cost-to-benefit ratio of altruistic and cooperative acts is greater than a threshold value. The cost-to-benefit ratio can be altered by coercion, punishment and policing which therefore act as mechanisms facilitating the evolution of altruism and cooperation. All the models proposed so far are explicitly or implicitly built on these general principles, allowing us to classify them into four general categories

The criminal profiling illusion:what's behind the smoke and mirrors?

There is a belief that criminal profilers can predict a criminal's characteristics from crime scene evidence. In this article, the authors argue that this belief may be an illusion and explain how people may have been misled into believing that criminal profiling (CP) works despite no sound theoretical grounding and no strong empirical support for this possibility. Potentially responsible for this illusory belief is the information that people acquire about CP, which is heavily influenced by anecdotes, repetition of the message that profiling works, the expert profiler label, and a disproportionate emphasis on correct predictions. Also potentially responsible are aspects of information processing such as reasoning errors, creating meaning out of ambiguous information, imitating good ideas, and inferring fact from fiction. The authors conclude that CP should not be used as an investigative tool because it lacks scientific support

The manufacture of hope : religion, eschatology and the culture of optimism

This article builds on earlier research, which concludes that societies cannot sustain themselves without cultures of optimism. These cultures are reproduced by a complex of ‘optimism promoters’, all of which can be seen to be engaged in a kind of unstated or ‘implicit’ cultural policy, with the production of optimism as one of its goals. The institution of religion is part of this complex. Its role in the production of optimism is the focus of this article, with particular reference to soteriology (theories of salvation) and eschatology. From a ‘detached’ and ‘functionalist’ perspective, it analyses how religions manufacture hope through (1) the production of meaning; (2) through their models of divine justice; and (3) through theories of ultimate destiny. These matters are discussed in relation to Hinduism, Buddhism, Christianity and Islam. The article concludes that the optimisms of religion are of a quite different order from those promoted by other institutions