“Why do we humans have phobias? If we grew up and evolved with nature for so long, why do so many people have such a great fear of it? For example, evolution indicates we came out of the oceans, yet a great many people have an intense fear of swimming in the ocean, or even a tranquil backyard swimming pool For hundreds of thousands of years as we evolved we lied our nights in darkness, yet the fear of darkness is ubiquitous among humans. Insects and spiders, which generally can do us no harm whatsoever, and can easily be killed by us with only the slightest effort, cause many people to go into paroxysms of fear.”