A concise and accessible introduction to natural law ethics, this book introduces readers to the mainstream tradition of Western moral philosophy. Building on philosphers from Plato through Aquinas to John Finnis, Alfonso Gomez-Lobo links mortality to the protection of basic human goods--life, family, friendship, work and play, the experiences of beauty, knowledge, and integrity--elements essential to a flourishing, happy human life. Making arguments consistent with Catholic teaching but not based on theological considerations, this book falls squarely within the field of philosophical ethics and will be of interest to readers of any background.