3/11/2013 Dan Pink is author of 5 best-selling books, with his current ''To Sell is Human.'' 1 in 9 humans work for a living selling something. So what about those other 8? They are also in sales...of some type and in essence we're all in sales or some aspect of it. Dan addresses the trepidation you might have of this notion and how it's not as negative as you might think.