The 2013 and 2015 World Social Forums in Tunis, Tunisia hosted thematic “climate spaces” for the first time. This article examines the extent to which these spaces are constitutive of a form of “transformative peacebuilding” aiming to transform social relations and eliminate the structural violence of the world capitalist economy. Both the theoretical and practical activities of civil society at the climate spaces are shown to be transformative but only to the extent that they contest broad processes of trasformismo which transcend differences and obscure the lived realities of governance and resistance. In this sense, civil society groups and movements at the climate spaces are shown to engage with global capitalism to potentially produce new global understanding and action. This generates new understandings of civil society as constitutive of directly resistant modes of social relation that push for radically different visions of climate justice and governance.