The Basque Country has traditionally been considered a strongly polarized political community. The influence of the center-periphery cleavage and the shadow of political violence have conditioned many aspects of social life, including relations among civic organizations. Previous literature suggests that differences in organizations’ national identities and/or position towards ETA’s (Euskadi ta Askatasuna, or Basque Country and Freedom in the Basque language) violence have often acted as cleavages fragmenting collective action fields. This research examines whether this picture changed substantially after ETA’s abandonment of violence in 2011 by taking the environmental field as a case study and looking at the evolution of patterns of interorganizational collaboration between 2007 and 2017. The results of statistical network analyses show that both Basque nationalism and ideological positions towards ETA’s use of violence had a strong influence on organizations’ decisions to collaborate with one another up to 2011, whereas during the more recent postconflict period, collaboration seems to occur in a more pluralistic and less ideologically driven fashion.

巴斯克地区历来被认为是一个两极分化的政治社区。中心—边缘分裂的影响和政治暴力的阴影影响了社会生活的许多方面，包括公民组织之间的关系。以前的文献表明，组织的国家身份和/或对 ETA（巴斯克语中的巴斯克国家和自由）暴力的立场的差异经常作为分裂集体行动领域的裂痕。本研究以环境领域为案例研究，并观察 2007 年至 2017 年间组织间合作模式的演变，检验了在 2011 年 ETA 放弃暴力之后，这一情况是否发生了重大变化。