> How many billions of calories have been burned to fuel thoughts of worry about an outfit choice around the world?...The stress society tries to shovel on you is such a waste of energy and does nothing to help you.

Sadly, not enough to offset our sedentary lifestyle and diets. I can't be too concerned about the energy expenditure involved in worrying about meaningless things. For now anyway, we've got energy to spare. The toll of all that stress on our bodies is much worse than the calories we lose. Still, I'd rather be worried about the trivial things that we occupy ourselves with than the life or death worries humans regularly faced when we were berry foragers. Going from worrying over "Will we eat today?" to "Which of several restaurants should we go to for lunch?" is a blessing.