The debate surrounding individual climate duties is divided between collectivists and unilateralists. The fair shares argument is the most influential unilateralist position. In this paper, I demonstrate how a Kantian approach could solve three problems the fair share argument faces. Firstly, the Kantian focus on an agent’s will avoids skepticism regarding the causal connections between individual actions and climate effects. Secondly, a Kantian argument for the imperfect duty to minimally restrict our emissions to an equal share justifies egalitarian fair shares. (...) Thirdly, a Kantian ethical approach has direct political implications, taking away concerns about a distracting focus on individual efforts. (shrink)