This work investigates whether the law possesses the authority to enforce a society's shared moral code, even in the absence of direct physical harm to individuals. Patrick Devlin, a distinguished British judge and legal scholar, utilizes his extensive background in jurisprudence to challenge the prevailing liberal consensus established by John Stuart Mill. He argues that a society is held together by a common morality, and that the law must act as a mechanism to preserve this structure against erosion.

Experts frequently cite this text as a foundational contribution to the Hart-Devlin debate, which remains a central pillar in legal philosophy curricula. Readers often note the clarity and precision of Devlin's prose, which makes complex jurisprudential concepts accessible to those outside the legal profession.