A black swan is an event, positive o r negative, that is deemed improbable yet causes massive consequences. In this groundbreaking a nd prophetic book, Taleb shows in a playful way that Black Swan events explain almost everything about our wo r ld, a nd yet we—especially the experts—are blind to them. In this second edition, Taleb has added a new essay, On Robustness a nd Fragility , which offers tools to navigate a nd exploit a Black Swan wo r ld.