This work investigates the philosophical and legal criteria that determine when an individual who has committed a criminal act should be legally excused. Jeremy Horder, a professor of criminal law, challenges the traditional classical view of excuses by analyzing the underlying principles of culpability. He argues for a more expansive legal framework that recognizes a broader spectrum of excusing conditions, suggesting that current doctrines are overly restrictive in their application.

Legal scholars and practitioners frequently cite this text for its rigorous challenge to established criminal law doctrines. It is widely regarded as a significant contribution to the academic discourse on legal culpability and the moral foundations of the justice system.