Book excerpt: Assuming that liberalism, liberal democracy and the free market are here to stay, this book asks how sustainability can be interpreted in ways that respect liberal democratic values and institutions. Among the problems addressed are the compatibility of liberal proceduralism with substansive 'green' ideals, the existence and potential of eco-friendly principles and ideas in classical liberal political theory, the role of rights and duties and of democracy and deliberation, and the 'greening' potential of modern environmental-focused practices in liberal democracies.