Happiness experts have long told us to tune out our negative emotions and focus instead on mindfulness, positivity, and optimism. Researchers Todd Kashdan, Ph.D., and Robert Biswas-Diener, Dr. Philos., disagree. Positive emotions alone are not enough. Anger makes us creative, selfishness makes us brave, and guilt is a powerful motivator. The real key to success lies in emotional agility. Drawing upon extensive scientific research and a wide array of real-life examples, The Upside of Your Dark Side will be embraced by business leaders, parents, and everyone else who’s ready to put their entire psychological tool kit to work.