The impact of climate change on the environment and human societies -- The capitalist world system and its contradictions -- The capitalist treadmill of production and consumption as a generator of greenhouse gas emissions -- The inadequacies of existing climate regimes for mitigating climate change -- Why green capitalism is insufficient to mitigate climate change -- A vision of an alternative world system : toward global democracy based on social justice and environmental sustainability -- Toward an ecological revolution : progressive transitional reforms -- Grass-roots responses to the climate change : internationally, nationally, and locally -- Conclusion.