No silver bullets in complex, loosely coupled, evolving systems.

Part of a general trend. Studies suggesting that single genes have a big impact on any trait tend not to replicate. Genetic contributions to complex behavior usually come not from one or a few genes with large effects, but from many 100s or 1000s of genes with very small effects. https://t.co/oEnTx8wzdI

— Steve Stewart-Williams (@SteveStuWill) May 12, 2020