This book investigates the possibility of achieving objectivity in moral reasoning without reducing ethical questions to mere empirical facts. R. M. Hare, a prominent moral philosopher, draws upon his extensive career to critique rival ethical theories while articulating his own framework. He argues that moral language is inherently prescriptive and universal, suggesting that rational agreement is the true path to objective ethical standards rather than cultural relativism.

Experts recognize this work as a definitive summary of Hare's philosophical contributions and a vital text for understanding his specific brand of prescriptivism. Readers frequently note the clarity of the prose, which makes complex meta-ethical arguments accessible to those familiar with the field.