To examine and distinguish all the different sorts of crimes and the manner of punishing them would now be our natural task, were it not that their nature, which varies with the different circumstances of times and places, would compel us to enter upon too vast and wearisome a mass of detail. But it will suffice to indicate the most general principles and the most pernicious and common errors, in order to undeceive no less those who, from a mistaken love of liberty, would introduce anarchy, than those who would be glad to reduce their fellow-men to the uniform regularity of a convent.
What will be the penalty suitable for such and such crimes?
Is death a penalty really useful and necessary for the security and good order of society?
Are torture and torments just, and do they attain the end which the law aims at?
What is the best way of preventing crimes?
Are the same penalties equally useful in all times?
What influence have they on customs?
These problems deserve to be solved with such geometrical precision as shall suffice to prevail over the clouds of sophistication, over seductive eloquence, or timid doubt. Had I no other merit than that of having been the first to make clearer to Italy that which other nations have dared to write and are beginning to practise, I should deem myself fortunate; but if, in maintaining the rights of men and of invincible truth, I should contribute to rescue from the spasms and agonies of death any unfortunate victim of tyranny or ignorance, both so equally fatal, the blessings and tears of a single innocent man in the transports of his joy would console me for the contempt of mankind.