The purpose of this article is to provide a commentary on the reports of the findings from the longitudinal Children in the Community (CIC) study by Cohen, Crawford, Johnson, and Kasen (this issue), Collaborative Longitudinal Personality Disorders Study (CLPS) by Skodol et al. (this issue), and McLean Study of Adult Development (MSAD) by Zanarini, Frankenburg, Hennen, Reich, and Silk (this issue). This article focuses in particular on the implications of their longitudinal findings with regard to a fundamental component of personality disorder: temporal stability. Also discussed are their findings with regard to an integration of general personality structure with personality disorder.