Political activism is aimed at challenging extent policies and changing consensual attitudes which are dominant among society's members. However, activism may also affect the beliefs and attitudes of those people who partake in it, regarding its efficacy and their ability to achieve the desired policy change. The current project seeks to examine these unintended consequences of activism through the experience of peace activists in the context of the Israeli-Palestinian conflict. This presentation will examine the effects of ongoing activity in Israeli peace organizations on political beliefs and attitudes of several prominent Israeli peace activists.