State intervention and planning are not capitalism’s preferred ways of working, yet the need for state and globally agreed action is essential to tackling global warming. Yet if there is no viable planet then there is no capitalism either. Could this existential threat force capitalism to deal with the climate crisis? Having posed the question and put forward demands for achieving progress, we certainly shouldn’t just wait for this to happen, nor can we afford to wait for socialism to rescue us either. We need to campaign today to make governments act to halt the continued warming of our planet. We can also join with the developing world which is seeking climate justice. These are the countries often most affected by climate change, but they are not the ones which caused it. They demand that the industrialised countries who made their wealth from polluting the planet pay for the transition to a green future.