T he Second Century of Psychoanalysis is the fourth book in the Confederation of Independent Psychoanalytic Societies series The Boundaries of Psychoanalysis. The editors of this volume are members of the Los Angeles Institute and Society for Psychoanalytic Studies (LAISPS), the fourth society admitted to the IPA after settlement of the antitrust lawsuit against APsaA, the IPA, and the New York and Columbia institutes. That suit reversed decades of exclusion of psychologists from APsaA, gaining nonphysicians the right to train in APsaA institutes, and non-APsaA societies in the United States the right to become societies in the IPA. All of the thirteen contributors are faculty members at LAISPS, and all, with the lone exception of Leo Rangell, are psychologists. American psychoanalysis lost a great deal when it decided to follow A. A. Brill rather than Sigmund Freud in the matter of lay analysis. What is done cannot be undone, but at least the contributions of those once excluded can now be disseminated widely, both in the North American psychoanalytic community and worldwide.This book, a collection of original papers on the therapeutic action of psychoanalysis, addresses questions often raised but seldom answered satisfactorily, at least not to the point that anything approaching consensus has been reached. In 1920 a prize was offered for the best paper on the topic, but it was never awarded: no paper was deemed good enough. Since then, the discussion has repeatedly become bogged down in false dichotomies, such as the vexed question "Is interpretation or relationship the true curative factor in psychoanalysis?"