>This sort of argument--that those reports must be inaccurate, because--well, I'm not sure why you you think these reports are inaccurate, except that you think they must be. And that's not a reason.
This is just an educated guess. If you provide actual sources I can verify what the academic community thinks of these reports or findings, and really that's the only best available metric I can go off of.
>I'm also pretty sure any linkage of serotonin to hierarchy is unproven.
Science cannot prove anything. Be very careful with your language. Especially in the social sciences where things are less quantitative... proof is fundamentally impossible. There is only evidence in favor of and evidence against.