The origins of the phrase “the luck of the Irish” doesn’t mean what you might think it does: It’s about always looking on the bright side and remembering that things could be worse. John Tierney joins host Krys Boyd to talk about searching for the half-full glass when it seems the world wants to smash it altogether. His book, co-written with Roy Baumeister, is called “The Power of Bad: How the Negativity Effect Rules Us and How We Can Rule It.”