Originally Posted by Carbonfiberboy

Actually it is an adaptation coded in our DNA. It happened during the "starving time" as a way to keep the DNA moving down the chain, the key being that our brains can run on ketones if food is not available for a long period. Otherwise we'd die. That it's so universal in us gives an a good perspective on our past, notice that we have it really easy right now, and a good taste of fear for our future. But as you say, it's nothing that we would choose in normal times. DNA never makes a mistake. Even its seeming failures are successes. Diversity is good.