The Black Swan: Second EditionBy: Nassim Nicholas Taleb Series: Incerto NEW YORK TIMES BESTSELLER The most influential book of the past seventy five years: a groundbreaking exploration of everything we know about what we dont know, now with a new section called On Robustness and Fragility. A black swan is a highly improbable event with three principal characteristics: It is unpredictable; it carries a massive impact; and, after the fact, we concoct an explanation that makes it