Eddie the head said:
NeutralDrow said:
Don't worry. It's inevitable that someone has already used an argument like that as justification for sexism, but it's also bad science, so there's no harm done. Basically, the only way that could work is if "risk-taking" were some sort of specific gene located only on the y-chromosome, because that's the only genetic source that's (mostly) specific to men. And for that matter, it would have to be some kind of super-dominant gene, because it would have to somehow overwhelm the "safety first" x-chromosomes men get from their mothers.
Put another way, be wary of evolutionary explanations for sex-contrasted phenomena. Especially behavioral phenomena.
Yeah. I don't think you understand evolution, genetics, or epigenetics. (Ok I don't, but I understand it better then this) Because it's not just the genes you have it's also the genes you body uses. And to what degree it's used. Perhaps "used" is the wrong word "expressed" is better.
How your genes are expressed is, at least in part, due to your hormone levels. And would you look at that the Y chromosome dose have some sort of overriding authority on this. The Y chromosome pretty much exclusively increases your testosterone levels. And testosterone has been shown to increases aggressive risk taking behavior. It also effects how some parts of the body develop most notably the genitals. The genetic information for a penis and a vagina is in both males and females testosterone effects witch one is expressed. Similar things happen in the brain as well, but to such a degree. So yeah the Y chromosome dose do exactly what you said it would need to do. All be it indirectly. And with other factors.
The only male-exclusive effect of testosterone is initial sexual differentiation. Even going by an indirect "Y Chromosome induces testis development, which might account for higher levels of testosterone in men," it's an oversimplification to associate it with testosterone alone, given that the hormone is also produced in the ovaries and adrenal glands (and the Y chromosome does other things, but sperm production and increased risk of certain developmental disorders aren't relevant at the moment).
Either way, while the relationship between testosterone and risk aversion is pretty well supported, its connection to evopsych is...I'm trying to come up with a nicer word than "laughable" (if only because I worry about coming across as personally insulting), but nothing's coming to mind. Again, the idea put forth by the book you cite could only work if there was something exclusive in the genetics of the "successful risk-taking males" that was passed only on to male children without being counteracted by a different selected gene in the "risk averse females." Since this can't be chalked up to testosterone's effects alone (as we see similar effects in mice and rats), this would require, like you hint towards, a gene that is dormant unless expressed with a certain amount of testosterone in a human system that only shows up in men. Or possibly that testosterone affects male and female bodies in different ways other than levels (levels of testosterone show effects that are consistent between genders; i.e. low levels of testosterone induce in both women
and men the same level of risk aversion). Far as I'm aware, neither idea has been tested yet.
Setting aside biology, I'd also question the logic of the sentiment. I assume you were paraphrasing, and that there was an actual definition of what "chances taken" are being talked about. But what causes the assumption that human males who take fewer risks and remain unkilled will breed in significantly lesser numbers than successful risk-taking males (especially in numbers significant enough to affect the Y chromosome, the most resistant to change)? Given their greater survival rate, one would think it'd be the other way around. And for that matter, why would risk-taking females be dying in significant enough numbers to affect human genetics? Evolution as a process doesn't treat "no reward" adaptations near as seriously as "harmful" adaptations, and a genetic expression is usually only "harmful" after the fact (in other words, if a change in environment causes enough death for its expression to disappear or be displaced).
I also fail to see why it's so absurd to think that evolution could help explain human behavior. It helps explain how other species behave. Our nervous system at it's core is no different for a earth worm, it's just more complex. Hell that's what the whole field of evolutionary psychology is about.
Evolutionary psychology is also very prone to making untestable post hoc rationalizations (not to mention it's the go-to discipline to invoke when one needs to argue for some gender determinism in support of whatever cultural behavior the arguer ascribes to). I'd call it the most, but I haven't spoken with many regular psychologists, so I can't compare. Either way, I find suspicion of the discipline justified.
I'll reiterate this it's not the only factor, but it is a factor. It's not "bad science" because you fail to understand it. And even if it was most "lies" start form an iota of truth. You should try and find that iota regardless of if you trust the conclusion.
We already started from the iota of truth (there are fewer female directors in Hollywood than male).
...that said, I can see the point of your original second paragraph. Different levels of risk aversion could be some kind of factor in the thing. I overreacted to the tie to evopsych, and I apologize.