Communication Lessons

What is the one question that almost all human beings seek the answer for? For most of their lives? Yeah, I know, there are those strange beings who want "Who am I?" answered or even,"Why do I exist?" or, if they are really verging on insanity, "Do I exist?" (And, no, I do not think that it is only to assure themselves of their existence that people take a selfie an hour and post it on Facebook