What happens when men and women feel powerful in intimate relationships? When does power corrupt and when does it lead to positive consequences, such as increased sensitivity to others' needs, personal growth, and social responsibility? This book offers anyone interested in such questions a clear and accessible depiction of the effects of social power, based on cutting-edge theory and research. The book starts with a general discussion on the ways power influences individuals. The role of one's personality, goals, and culture seem to play a decisive role in whether power leads to benevolent or malevolent consequences. Some effects of power are more intuitively understood (eg: taking from or contributing to a common resource, or aggressive responses in parents who feel powerless), while other effects regard much more surprising phenomena (eg: self-fulfilling prophecies, stopping an annoying fan, or forgiveness for a transgression). Following the description of this social-psychological mechanism, this book discusses the cultural and developmental circumstances in which power is experienced. Culturally acquired gender-roles, experiencing racism, egoistic vs. altruistic motivations, and defensive tendencies -- all influence what men and women want in intimate relationships, and the way power can motivate them to attain their goals. These circumstances may explain the gender differences found in the results of three experiments, described in Chapter 4. In these experiments, men and women in long-term, intimate relationships reacted differently to a temporary sense of power, in terms of their tendency to self-focus, take the perspective of others, and objectify their relationship partners. The last section discusses the seemingly contradictory beliefs of professionals and laymen alike, that power corrupts, but that the empowerment processes yields positive results. In this section, the role of power and empowerment processes is discussed, mainly in macro-level interventions, in intimate partner violence (for both victims and perpetrators), overcoming addiction, and in policy practice (eg: in court verdicts regarding cases of post-divorce relocation of custodial parents).