This essay addresses the current criminal law debates about excusing by can
vassing the issues and arguments concerning excusing, in general, and the n
ew excuses, specifically. It concludes that the current system of criminal
blame and punishment is coherent, fair in principle, and can accommodate th
e claims for new excuses. In particular, the essay claims that the fairness
of blaming and punishing is immune from attacks based on the possible trut
h of determinism, which allegedly would render these practices unjust, and
provides a general, unifying defense of responsibility and the excuses. The
essay considers many of the leading explanations of the excuses and conclu
des that they are misleading. "New syndrome" claims are covered in detail.
Many of the new claims can be brought within the ambit of current criminal
law defenses, albeit with reasonable modifications to current doctrine in s
ome cases. Indeed, the syndromes that underpin claims for new excuses, prop
erly understood, do not raise new legal issues that demand substantial rest
ructuring of criminal law theory or doctrine, even if they do raise fresh b
iomedical or social scientific issues. Modifications to existing doctrine a
re in general preferable to the wholesale creation of new excusing conditio
ns. Finally, the essay provides and defends a generic theory of excusing an
d a new, generic doctrine of partial excuse that would justly respond to in
creased understanding of human behavior.