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Old 02-27-2017, 06:20 AM
Darren Garrison Darren Garrison is offline
Join Date: Oct 2016
Posts: 6,437
Originally Posted by adaher View Post
1) Pain- While pain seems to be pretty good at removing us from immediate danger, it's not very good at telling us how much damage we've incurred. Stubbing your toe hurts like a mortal wound, yet your body can die from the inside out from cancer and you can feel nothing until the latter stages.
The purpose of pain is to tell you "whatever you are doing, stop it, now!", or If you start having pain as soon as you have cancer, what are you going to do about it? For the vast majority of the time complex animals have been on Earth, you get cancer, you die. (The only change has been recently for some humans who have access to extraordinary means and some of their favorite pets--for most animals it remains that way.) If anything, the flaw isn't that cancer doesn't hurt sooner, it is that cancer ever hurts at all.

It would be nice to have pain that continues only to the point that you can do something about it (stop holding that cactus, shake that angry bandicoot off your ankle) then stop hurting when the danger passes, but 1.) evolution can't "look ahead" and plan solutions, and 2.) "comfort" is arguably not a barrier to reproduction ("not tonight, I have a headache" being a notable exception.)

2) Fat storage-Probably because living with such abundance is fairly recent, we might have to wait awhile for this one. Why would your body just keep storing fat until you literally die from too much of a good thing? While fat has a real purpose, it seems that our bodies should say enough as enough at some point and just eliminate excess fat as waste. But no, it's killing you yet your body just merrily continues along, perfectly willing to jack you up to 600 pounds
This one has the potential to be modified by evolution, but only if humans became unwilling to have sex/children with people who are fat. But that doesn't seem to be happening. (While some fat people may have problems getting sex, those that do may end up having a boatload of children (citation: American reality TV.))

3) Better brain-body coordination- as evolved as we are, we're more of a community than a true individual. Our brain does a pretty good job of controlling our muscular system and rational thought, but most bodily functions and regulations are inaccessible to us. Not only can't we do anything about most of them, we can't even get information on them without inventing machines that can tell us.
As in point 1, any information you would receive on internal problems would be evolutionary pointless because there is nothing that you can do about it (without modern medical technology.) What would be the point of your body telling you "hey just so you know, your pancreas just died" when there is nothing that you can do to run away from or fight off a dead pancreas?

As for conscious coordination, do you really want to have to remember to digest your food or filter out your urine? With semi-voluntary systems such as blinking or breathing, under stressful moments or times of high concentration, you can temporarily "forget" to blink or breathe. Would you like to be concentrating on something and forget to beat your heart?