America’s criminal codes are so voluminous that they now bewilder not only the average citizen but also the average lawyer. Our courthouses are so clogged that there is no longer adequate time for trials. And our penitentiaries are overflowing with prisoners. In fact, America now has the highest per capita prison population in the world. This situation has many people wondering whether the American criminal justice system has become dysfunctional. A generation ago Harvard Law Professor Henry Hart Jr. published his classic article, “The Aims of the Criminal Law,” which set forth certain fundamental principles concerning criminal justice. In this book, leading scholars, lawyers, and judges critically examine Hart’s ideas, current legal trends, and whether the “first principles” of American criminal law are falling by the wayside. Policymakers, academics, and citizens alike will enjoy this lively discussion on the nature of crime and punishment, and how the choices we make in formulating criminal laws can impact liberty, security, and justice.