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About 4 years ago in SOFMSSP there was this Maj [back then] that headed this study. He spoke to our class of his findings. Needless to say its pretty f-ckin cool whether you believe heredity or environment.
One thing I learned and still remember from the 18D course; the body has an unbelievable capacity to adapt to its environment. You walk a lot you get caluses, your in the sun a lot the skin learns to protect itself, there are people you can eat poisonous foods or that whack job in the SW that has envenomed himself with enough rattlesnake venom that it doesn't bother him anymore. Therefore I feel the tough, dangerous training and experiences cause the body to produce this chemical in greater amounts over time.
They should draw the blood of SF wannabes before they start and check the levels of the ones who made it again a couple years later for a more conclusive study.
I feel backgrounds have a part in it too. Most guys I know either; have no siblings, 1st born or are the shining star of a severely dysfunctional family.
In the end I think we have been doing something right all along through out history. Tough realistic training. SF happens to get most of the best and brightest to volunteer. I believe age, tough experiences, and the background the individual comes from make up most the SFers.
dave
Oh, I got a similar question; which came 1st the chicken or the egg?
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Strength~Determination~Merciless~Forever
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