This document summarizes a presentation about how states can facilitate a social and ecological transformation towards a post-growth sustainable welfare state. It outlines that states should ensure production and consumption patterns do not exceed environmental limits, define limits on economic and social inequality, and steer public and private actors. However, four main obstacles prevent states from taking these actions: the growth imperative, material interests of dominant groups, wellbeing concerns of the electorate, and asymmetric societal power structures. For states to become more active, there needs to be better academic understanding of alternative state roles, political/social mobilization to shift state balances of power, and co-development of eco-social policies between researchers, activists and citizens.