"Erdos's unadulterated self was less real and less familiar to him than his adulterated self, and that is a condition that holds, more or less, for the rest of society as well. Part of what it means to be human in the modern age is that we have come to construct our emotional and cognitive states not merely from the inside out -- with thought and intention -- but from the outside in, with chemical additives. The modern personality is, in this sense, a synthetic creation: skillfully regulated and medicated and dosed with caffeine so that we can always be awake and alert and focused when we need to be.
On a bet, no doubt, we could walk away from caffeine if we had to. But what would be the point? The lawyers wouldn't make their billable hours. The young doctors would fall behind in their training. The physicists might still be stuck out in the New Mexico desert. We'd set the world back a month."
-Malcolm Gladwell, Java Man-