How do social movements respond to the ecological crisis? In this paper, we reframe social movements as 'more-than-social movements' to highlight the fact that many contemporary mobilisations do much more than target recognised social institutions and political governance; indeed, they are practically transforming eco-societies with and within both the human and the nonhuman world. What constitutes the core of more-than-social movements' action is the capacity to set up alternative ecologies of existence, or 'alterontologies', as we call them in the paper. (...) In what follows, we engage with the imaginaries and practices of agroecology, AIDS treatment activism and permaculture in order to rethink what autonomy and justice might look like in the context of today's ecological crisis. (shrink)