We develop a cultural evolutionary theory of the origins of prosocial religions and apply it to resolve two puzzles in human psychology and cultural history: (1) the rise of large-scale cooperation among strangers and, simultaneously, (2) the spread of prosocial religions in the last 10–12 millennia. We argue that these two developments were importantly linked and mutually energizing. We explain how a package of culturally evolved religious beliefs and practices characterized by increasingly potent, moralizing, supernatural agents, credible displays of faith, (...) and other psychologically active elements conducive to social solidarity promoted high fertility rates and large-scale cooperation with co-religionists, often contributing to success in intergroup competition and conflict. In turn, prosocial religious beliefs and practices spread and aggregated as these successful groups expanded, or were copied by less successful groups. This synthesis is grounded in the idea that although religious beliefs and practices originally arose as nonadaptive by-products of innate cognitive functions, particular cultural variants were then selected for their prosocial effects in a long-term, cultural evolutionary process. This framework (1) reconciles key aspects of the adaptationist and by-product approaches to the origins of religion, (2) explains a variety of empirical observations that have not received adequate attention, and (3) generates novel predictions. Converging lines of evidence drawn from diverse disciplines provide empirical support while at the same time encouraging new research directions and opening up new questions for exploration and debate. (shrink)

Recent work in biology, cognitive psychology, and archaeology has renewed evolutionary perspectives on the role of natural selection in the emergence and recurrent forms of religious thought and behavior, i.e., mental representations of supernatural agents, as well as artifacts, ritual practices, moral systems, ethnic markers, and specific experiences associated with these representations. One perspective, inspired from behavioral ecology, attempts to measure the fitness effects of religious practices. Another set of models, representative of evolutionary psychology, explain religious thought and behavior as (...) the output of cognitive systems (e.g., animacy detection, social cognition, precautionary reasoning) that are not exclusive to the religious domain. In both perpectives, the question remains open, whether religious thought and behavior constitute an adaptation or a by-product of adaptive cognitive function. (shrink)

The primary debate among scholars who study the evolution of religion concerns whether religion is an adaptation or a byproduct. The dominant position in the field is that religious beliefs and behaviors are byproducts of cognitive processes and behaviors that evolved for other purposes. A smaller group of scholars maintain that religion is an adaptation for extending human cooperation and coordination. Here I survey five critiques of the adapationist position and offer responses to these critiques. Much of the debate can (...) be resolved by clearly defining important but ambiguous terms in the debate, such as religion, adaptation, adaptive, and trait, as well as clarifying several misunderstandings of evolutionary processes. I argue that adaptationist analyses must focus on the functional effects of the religious system, the coalescence of independent parts that constitute the fabric of religion. (shrink)

This paper provides an empirical study of how religious belief influences the views of philosophers about natural theological arguments. Philosophers rated eight arguments for and eight arguments against theism. We find a correlation between religious belief and the perceived strength of arguments: atheists tend to find arguments against theism stronger and arguments for theism weaker; theists evaluate arguments for theism as stronger than arguments against theism. The assessments of agnostics fall between those of theists and atheists. Other factors that correlate (...) with the perceived strength of the arguments are philosophical specialization and gender. We examine the potential role of confirmation bias, early-developed intuitions, philosophical expertise and gender differences to explain our findings. (shrink)

The main intent of this paper is to give an account of the relationship between bio-cognition and culture in terms of coevolution, analysing religious beliefs and language evolution as case studies. The established view in cognitive studies is that bio-cognitive systems constitute a constraint for the shaping and the transmission of religious beliefs and linguistic structures. From this point of view, religion and language are by-products or exaptations of processing systems originally selected for other cognitive functions. We criticize such a (...) point of view, showing that it paves the way for the idea that cultural evolution follows a path entirely autonomous and independent from that of biological evolution. Against the by-product and exaptation approaches, our idea is that it is possible to interpret religion and language in terms of coevolution. The concept of coevolution involves a dual path of constitution: one for which biology (cognition) has adaptive effects on culture, the other for which, in turn, forms of culture have adaptive effects on biology (cognition). This dual path of constitution implies that religion and language are (at least in some aspects) forms of biological adaptations. (shrink)

Why me? -- Sticks and stones -- Hammer of God -- God is great -- The problem of atheists -- Guardian angels -- Nations under God -- God knows.

This chapter contains sections titled: Introduction Function and Malfunction Function and Evolution Function Based on Past Origins Biological Functions Based on the Distant Past: Natural Selection Fitness and Goal‐Contribution Accounts Neo‐Teleology Looking at the Present: Causal Roles and Functions Evolution Bites Back: Vindication of the Selectionist Approach Postscript: Counterpoint Acknowledgments Notes References.