Book excerpt: Reprint of the fourth edition, which contains an additional text attributed to Voltaire. Originally published anonymously in 1764, Dei Delitti e Delle Pene was the first systematic study of the principles of crime and punishment. Infused with the spirit of the Enlightenment, its advocacy of crime prevention and the abolition of torture and capital punishment marked a significant advance in criminological thought, which had changed little since the Middle Ages. It had a profound influence on the development of criminal law in Europe and the United States.