Is moral value, as some theories of ethics insist, different from economic value? Should the moral value always override the economic value?

The usage of the pronoun I is not innate but acquired. At first, Infants use their proper names to refer to themselves. It is so difficult to master the usage of I that it takes a long time for infants to know how to use the first-person pronoun. When, how and why did we get to use the first-person pronoun?