...or do they actually, in many circumstances, thrive because we've evolved to live under "thrifty" pre-industrial conditions? In the book I referenced (Born T

...or do they actually, in many circumstances, thrive because we've evolved to live under "thrifty" pre-industrial conditions? In the book I referenced (Born To Run), the author describes an extremely isolated Mexican tribe where 40-50 year old men regularly run 50-mile plus races in bare feet, in good part, many believe, because they've shunned shoes. I wouldn't be surprised if we come to the same conclusion about mattresses. Again, I'm just throwing this in because I think it's best to think flexibly. I also often argue that it makes perfect sense to splurge on a $60 massage or a $75 per person meal every now and then because memorable experiences are surprisingly valuable and more permanent (in one's mind) than they might appear to the impulsively thrifty consumer.