T. M. Scanlon is one of the world’s leading philosophers, widely known for his contractualist moral theory and his distinctive account of moral responsibility and blame. In these important essays, written between 2001 and 2021, Scanlon reflects on the lines of thinking that led him to these views, considers objections to them, and locates them in relation to the views of others, including Derek Parfit, Harry Frankfurt, Gary Watson, and Christine Korsgaard.