The authors named Amy Chua (Battle Hymn of the Tiger Mother) and Rubenfeld (The Interpretation of Murder)Yale Law professors and spousesshow why certain groups in the U.S. perform better than others. According to the authors, three traits breed success: a superiority complex, insecurity, and impulse control. Only when this Triple Package' comes together does it generate drive, grit, and systematic disproportionate group success.' In Korean. Annotation copyright Tsai Fong Books, Inc. Distributed by Tsai Fong Books, Inc.