Publisher Summary This chapter develops a systematic conceptual framework for the analysis of conflicts in terms of interdependence, and to describe the social interactions that have been ruled out by a great number of investigators. Thus, it deals with the dynamics of social conflicts as well as with their basic determinants. Empirical evidence supports the fact that the development of conflict is intimately related to the perceived potential and possible interrelations with another partner. The analysis has shown that the individual takes the information he or she gets about his or her partner into account, and has indicated how this information is used to implement his or her behavior and strategy. In particular, the initial beliefs held by a subject about his or her partner's responsiveness determine the future of the relationship. The chapter describes how interpersonal reactivity determines both the actual course of the interactions and the constitution of the interpersonal perceptions, and, furthermore, how perceptions of reactivity increase the likelihood of mutually satisfying exchanges and the development of an equilibrium. Understanding the partner's responsiveness gives the subject some control over the development of the relation because of the influence he or she exerts on his or her partner. The chapter examines under what conditions powerless individuals seek for equity and by what means they achieve this goal.