High heritability of bullying, plus negligible influence of shared family environment (including parental behavior), suggests that the 'cycle of violence' theory of bullying is wrong.https://twitter.com/DegenRolf/status/1254408485749559299 …
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blocked unfortunately but you bet I do! Although "grounded in genes" is vague. High heritability doesn't imply a lack of malleability or a lack of environmental contribution to a trait. It's pretty much only useful in the context of highly controlled plant and animal breeding
Low contribution from shared family environment sure does imply low environmental contribution to a trait, within the range of environments that kids have experienced.
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That's not necessarily true because (and this is especially the case with broad sense heritability) the genetic components often include gene-environment interplay http://publish.illinois.edu/dabriley/files/2018/11/Briley-2018-Interpreting-behavior-genetic-models.pdf … and even the environmental components can interacthttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC4888873/ …
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but again the biggest issue is confusing variance components with causes, as environment can still play a large role in traits with low shared-environmental components this goes back to Kempthorne http://www.acteon.webs.upv.es/ARTICULOS/KEMPTHORNE-LOGICAL_EPISTEM-_1978-_BIOMETRICS.pdf …
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