Yes, I know the concept of "I" is a delusion, a mere concept, but what I am looking for is how the delusion got started. What's the function of this delusion? Is it to enlarge our ego, to attain more power within a social group ... etc. I always think that if the apes were the first to realize the concept of "I" in pre-stone age or stone age - because one ape had a lightbulb moment after he had learned how to use a piece of cattle bone as a weapon, felt that he could use it to rule over a group, and possibly that's how the first concept of "I" arose ? Of course, this is just my wild supposition. No in depth study or proof.