Limiting global warming to 1.5°C above pre-industrial is feasible, and it is our best hope of achieving environmental and social justice, of containing the impacts of a global crisis that was born out of historical injustice and highly unequal responsibility. To do so will require a radical shift away from resource-intensive and wasteful production and consumption patterns and a deep transformation towards ecological sustainability and social justice. Demanding this transformation is not ‘naïve’ or ‘politically unfeasible’, it is radically realistic. This publication is a civil society response to the challenge of limiting global warming to 1.5°C while also paving the way for climate justice. It brings together the knowledge and experience of a range of international groups, networks and organisations the Heinrich Böll Foundation has worked with over the past years, who in their political work, research and practice have developed the radical, social and environmental justice-based agendas political change we need across various sectors. [2]