The origins of property law.

Research is increasingly suggesting that human intuitions form the core of many laws. Laws, therefore, can serve as one potential testing ground for new theories about the content and structure of intuitions. Here the model of ownership psychology as an evolved cognitive adaptation is evaluated against long-standing features of property law.

The origins of criminal law.

Laws against wrongdoing may originate in justice intuitions that are part of universal human nature, according to the adaptationist theory of the origins of criminal law. This theory proposes that laws can be traced to neurocognitive mechanisms and ancestral selection pressures. According to this theory, laypeople can intuitively recreate the laws of familiar and unfamiliar cultures, even when they lack the relevant explicit knowledge. Here, to evaluate this prediction, we conduct experiments with Chinese and Sumerian laws that are millennia old; stimuli that preserve in fossil-like form the legal thinking of ancient lawmakers. We show that laypeople's justice intuitions closely match the logic and content of those archaic laws. We also show covariation across different types of justice intuitions: interpersonal devaluation of offenders, judgements of moral wrongness, mock-legislated punishments and perpetrator shame-suggesting that multiple justice intuitions may be regulated by a common social-evaluative psychology. Although alternative explanations of these findings are possible, we argue that they are consistent with the assumption that the origin of criminal law is a cognitively sophisticated human nature.

Consumption, contact and copulation: how pathogens have shaped human psychological adaptations.

Disgust is an emotion intimately linked to pathogen avoidance. Building on prior work, we suggest disgust is an output of programmes that evolved to address three separate adaptive problems: what to eat, what to touch and with whom to have sex. We briefly discuss the architecture of these programmes, specifying their perceptual inputs and the contextual factors that enable them to generate adaptive and flexible behaviour. We propose that our sense of disgust is the result of these programmes and occurs when information-processing circuitries assess low expected values of consumption, low expected values of contact or low expected sexual values. This conception of disgust differs from prior models in that it dissects pathogen-related selection pressures into adaptive problems related to consumption and contact rather than assuming just one pathogen disgust system, and it excludes moral disgust from the domain of disgust proper. Instead, we illustrate how low expected values of consumption and contact as well as low expected sexual values can be used by our moral psychology to provide multiple causal links between disgust and morality.This article is part of the Theo Murphy meeting issue 'Evolution of pathogen and parasite avoidance behaviours'.

Prostate cancer in black men

The aim of this paper is to emphasize the need for increase vigilance in evaluating the prostate for malignancy, and to widen the age grouping in black men. A literature search was carried out and statistics of the American Cancer Society were reviewed. Correspondence was undertaken with urologists in large and small populations of the United States of America, Africa and the Caribbean. Some mixed races (some all black) and a report on the concerns and recommendations of a joint meeting of the American Cancer Society, National Cancer Institute and Centers for Disease Control and Prevention were incorporated (November 1997, Houston, Texas).(AU)