Four I's: Your true selves, really.

There's a new way of looking at the self that conforms more to what the scientific evidence suggests. We know we evolved, and that our fellow creatures, which also evolved, nevertheless don't seem to engage in searches for their true selves. Flies fly without every wondering why, without ever looking inside for the true source of their flight. Introspection, the ability to picture a true self, seems pretty much new with humans. Even with us, though, it doesn't consume our day. Watching TV, maintaining liver function, or simply breathing -- we have plenty of self-perpetuating habits that don't depend on self-awareness. Still, there's no family of words that roll off our tongues as readily as first-person singulars. "I," "me," "my" -- we speak of these things with great authority. In light of evolution, however, what do these words mean? Read the full article here.  
The article is by Jeremy Sherman MD.