An intriguing thought just occurred to me. We understand that we can make the experience of life more pleasant (at least temporarily) by altering our brain chemistry with various substances – martinis, heroin, coffee etc. So why wouldn’t we be “designed” to be in this state all the time? Why not exist in a state of constant pleasure.
The answer, I think, is that the pleasure state is worthless when one is trying to survive in a world of survival of the fittest. In our normal state, if we see a approaching tiger we say, “Holy Fuckburger! A tiger! Run!” But after a martini we might say, “Awww… look at the nice, widdle puddy cat. C’mere kitty I’llsh give you a tickle.” The martini laden version of ourselves wouldn’t likely live long enough to pass on his/her genes.
So the martini or drug soaked brain does not last long in the savage world. What brain does? The anxious, fear laden brain most of us are stuck with. Nature does not reward sensations of joy, peace, calm, but rewards paranoia, phobias, hatred.