Throughout the second session, we focus on the role that individual and collective actors, in particular social movement activists from the disability and environmental movement, play in the process of legal mobilization. What barriers do they face in mobilizing the law and in achieving policy change? And what explains some of these obstacles at the national and transnational (EU) level? Current theories have focused largely on the common-law realm and on instances of successful mobilization and have focused less on the absence of it. Therefore, this session will also try to develop a more robust theoretical framework for the absence of legal mobilization that moves beyond questions of individual, actor-level strategic choices to system level.