This Introduction specifies the book’s aims. Its main thesis is that a comprehensive examination of Kant’s texts displays the relevance of his ethical, legal, aesthetic, metaphysical, and historical ideas for environmental problems like climate change, despite the standard view of Kant as anthropocentrist, individualist, dualist, and nonconsequentialist. Doing so, the book builds a bridge between environmental philosophy and Kant studies by offering distinctly Kantian solutions to environmental problems. I begin with an overview of the tensions in these philosophical fields, emphasizing that the climate crisis exhibits the value of Kant’s philosophy for contemporary environmental problems. After providing empirical background on climate change, I indicate why philosophy matters for the crisis. A recent greening-the-canon movement in environmental philosophy nonetheless places Kant on the wayside. The Introduction also offers an overview of the chapters.