Getting high started happening a few hours after the first breath, the first boink, and the first meal. As humans have always instinctively known, reality sucks and moreover is incomprehensible. Therefore altered states and the desire to experience them have and always will be with us.
Zippo connection with intelligence - although personally, I'd say straight arrows are not only more boring (less interesting) than indulgers, they are also duller and less imaginative.