Driver explains the "Greatest Happiness Principle," where the morality of an action is judged solely by its outcome. She navigates the classic critiques—such as the potential for "tyranny of the majority"—and distinguishes between act utilitarianism (evaluating each deed) and rule utilitarianism (evaluating general principles).
Shifting from "what should I do" to "what kind of person should I be," Driver explores how character and habits form the basis of morality. She examines the "Golden Mean"—finding the virtuous balance between extremes (e.g., courage as the middle ground between cowardice and recklessness). Metaethics and Moral Psychology
The fundamental takeaway of the work is that while no single theory is without flaws, understanding these different "lenses" allows for a more nuanced and rigorous approach to moral life.