You are so right and I think it shows in situations and areas of desperation in which we have a higher tendency to return to those primal instincts of survival.

After some time to better articulate my thoughts, I think I have gotten more concise in what I was trying to originally get at. Man has the tendency to ponder, worry about our own impending demise and more simply the stresses that tomorrow may bring. Not many animals have that forward thought. But again, to your point, how do we even know that?! Thanks for the food for thought.