Scott Alexander uses the evolution of genetic science as a metaphor to explore how other fields might benefit from recognizing the polycausal nature of complex phenomena. Longer summary

Scott Alexander discusses the evolution of genetic science, from the search for single genes responsible for complex traits to the current understanding that almost all genes contribute to these traits. He uses this as a metaphor for other sciences, particularly psychiatry, suggesting that many fields may be more polycausal than initially thought. The post explores the implications of this shift, including skepticism about personalized medicine and the potential need for new approaches to scientific research that can handle massive numbers of interacting causes. Scott concludes by imagining a hypothetical alien society where science is centered around polycausal scores, presenting this as a thought experiment for what science could aspire to be. Shorter summary