Comment by tomhoward | Hacker News Reader

Comment by tomhoward | Hacker News Reader

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Yes I’ve been exploring this topic (and undertaking personal growth work) for well over a decade. I know all about the twin studies and the way they’re used to support all kinds of claims but that don’t actually hold up to scrutiny.

DNA just encodes proteins. It can’t explain/predict detailed behavioral patterns. A prominent example of how genetics can influence aggressive/criminal behavior is due to variations in the MAOA (“Warrior”) gene, but the promotion/suppression of this gene is still strongly influenced by environmental factors [1].

Twin studies (particularly separated twin studies) claim to prove that all kinds of things are genetically encoded, because “they must be”, without considering how much is caused/influenced by other factors - the gestational environment and the experience of being separated from the birth family being the most obvious.

That’s not to say these behavioral patterns aren’t deeply ingrained and difficult/slow to change, but that’s very different from being hard-coded in DNA and impossible to change. For n=1 anecdata, I’ve significantly reduced my aggressive tendencies after years of growth work.

[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3469457/#:~:tex....

Are you willing to have a detailed discussion on this? I don't want to spend a few hours refreshing my knowledge of the research and gathering papers only to be ignored.

(Also, did you check out the paper I linked?)

I read the abstract and skimmed the main content and couldn’t find anything that refutes what I’ve written or what I understand.

I’m fine to have a discussion if your intention is to achieve a shared understanding of the topic, which is what healthy debating is about and what this site seeks to cultivate (even if it rarely achieves it). It does seem a little like you’re more interested in “winning” an argument for a position you’re already invested in, but I’m happy to be shown otherwise and to engage in a discussion if you bring a spirit of shared learning to it.

Edit: rather than doing it here (in a thread that is already very long and stale) you can email me if you like (address in bio).

Further to my previous comment, before you write much on the topic, make sure you've properly read and considered what I've written (just the previous few comments relating to genetic determinism), in relation to the paper you shared. On reflection, I'm surprised you wrote "did you check out the paper I linked?", as if you assume it contains findings that contradict anything I've written, and it makes me think you might be intending to argue against something you assume I believe rather than something I actually believe. To be clear: (a) I believe very strongly in inheritance and common patterns of behaviour among family members; (b) I know of no research proving that behavioural patterns are entirely attributable to DNA code and/or are immutable, and (c) I'm aware of ways deeply ingrained patterns of behaviour can be significantly altered/abated when effective approaches are applied. The paper you linked doesn't make any specific claims relating to parts (b) or (c) of my statement.

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