If you're reading this description, you're alive at the greatest moment of human history. Out of the past 52,000 years of human existence, 99.9% of people lived in times fraught with some combination of mass disease, intolerance, poverty, famine, death, war, or a struggle to survive. You do not. If we took the last twenty years and divided them by 52,000, we find that you have experienced just .0003% of the human story. And, lucky for you, you're...