In 1961, Ernst Mayr published a highly influential article on the nature of causation in biology, in which he distinguished between proximate and ultimate causes. Mayr argued that proximate causes (e.g. physiological factors) and ultimate causes (e.g. natural selection) addressed distinct ‘how’ and ‘why’ questions and were not competing alternatives. That distinction retains explanatory value today. However, the adoption of Mayr’s heuristic led to the widespread belief that ontogenetic processes are irrelevant to evolutionary questions, a belief that has (1) hindered (...) progress within evolutionary biology, (2) forged divisions between evolutionary biology and adjacent disciplines and (3) obstructed several contemporary debates in biology. Here we expand on our earlier (Laland et al. in Science 334:1512–1516, 2011) argument that Mayr’s dichotomous formulation has now run its useful course, and that evolutionary biology would be better served by a concept of reciprocal causation, in which causation is perceived to cycle through biological systems recursively. We further suggest that a newer evolutionary synthesis is unlikely to emerge without this change in thinking about causation. (shrink)

This article introduces one type of comprehensive complex systems model to explain why humanity continues to be frustrated by its lack of progress toward sustainability. Human overconsumption has now raised concern over the depletion of resources and environmental decay to critical levels that threaten the integrity of the human species, the planet's biodiversity and the global ecosystem in general. The focus on biopsychosocial explanations of human unsustainability is framed to encourage an interdisciplinary approach to problem solving towards a global bioethics. (...) This framework relies on three essential elements: the first concerns the notion that human overconsumption behavior is principally driven by an unconscious set of evolutionary predispositions to survive and prosper; the second element focuses on our unique psychological make-up, which at its core is universal and naturally selected over a geologic period that spans at least the 200–250 million-year natural history of mammals; the third component of the biopsychosocial model is the human evolutionary predisposition to seek out and participate in social behavior. This third element is selected because of the reciprocal benefits of cooperating with others for the purpose of enhancing everyone's survival. These three components have an evolved interrelationship and interdependence from which the full complement of human behavior emerges. Moreover, these three factors constitute the root causes of human overconsumption behavior and the basis for our unsustainable nature. This article argues that the biopsychosocial explanation of human unsustainability can adequately characterize virtually any kind of human and social phenomena that involve the exploitation of resources. Examples, such as the origins and effects of media and advertising, politics, education and religion on overconsumption, are discussed. The final section attempts to demonstrate that a comprehensive approach that unifies biological, psychological and social parameters toward solving the human unsustainability problem can be achieved. (shrink)

Rules regulating social behavior raise challenging questions about cultural evolution in part because they frequently confer group-level benefits. Current multilevel selection theories contend that between-group processes interact with within-group processes to produce norms and institutions, but within-group processes have remained underspecified, leading to a recent emphasis on cultural group selection as the primary driver of cultural design. Here we present the self-interested enforcement (SIE) hypothesis, which proposes that the design of rules importantly reflects the relative enforcement capacities of competing parties. (...) We show that, in addition to explaining patterns in cultural change and stability, SIE can account for the emergence of much group-functional culture. We outline how this process can stifle or accelerate cultural group selection, depending on various social conditions. Self-interested enforcement has important bearings on the emergence, stability, and change of rules. (shrink)

From a planetary perspective, industrialized humans have become unvirtuous and holistically destructive in comparison to 99% of human genus existence. Why? This paper draws a transdisciplinary explanation. Humans are social mammals who are born particularly immature with a lengthy, decades-long maturational schedule and thus evolved an intensive nest for the young. Neurosciences show that evolved nest components support normal development at all levels, laying the foundations for virtue. Nest components are degraded in industrialized societies. Studies and accounts of societies that (...) provide the nest, particularly nomadic foragers, the type of society in which humanity spent 99% of its genus history, indicate a more virtuous human nature than that industrialized societies think is normal or possible. Nest-supported human nature displays Darwin’s moral sense whereas unnested individuals show dysregulation and a degraded moral sense—a species-atypical human nature. Original virtue is about flourishing—of self, human community and the more than human community—within all circles of life, based in a deep awareness of humanity’s dependence on the rest of nature to survive. The pillars of original virtue include relational attunement, communal imagination, and respectful partnership with the natural world. All are apparent in human societies that provide the nest to their young, fostering connectedness throughout life. They maintain communal imagination through cultural practices that enhance ecological attachment and receptive intelligence to the natural world. (shrink)