Positive psychology is concerned not just with positive emotions that were the focus of Chapter 1, but also with positive traits (Lopez & Snyder, 2009; Seligman, 2002). One of the major achievements of positive psychology has been the establishment of a system for classifying traits of particular interest to researchers within the fi eld. These include such attributes as curiosity, bravery, kindness, forgiveness, and so forth. The development of this system is described by Professors Christopher Peterson and Martin Seligman (2004) in Character Strengths and Virtues, and will be outlined later in the chapter. However, to place this relatively new system for classifying character strengths in context, we will fi rst provide an overview of the relatively well-established fi eld of the psychology of personality traits.