Thomas Aquinas

“ For whatever is contrary to the natural law is unlawful. Now according to the natural law all things are common property: and the possession of property is contrary to this community of goods. Therefore it is unlawful for any man to appropriate any external thing to himself. ”

“ I answer that, Robbery implies a certain violence and coercion employed in taking unjustly from a man that which is his. Now in human society no man can exercise coercion except through public authority: and, consequently, if a private individual not having public authority takes another's property by violence, he acts unlawfully and commits a robbery, as burglars do. ”

“ A distinction must be made in the matter of spoils. For if they who take spoils from the enemy, are waging a just war, such things as they seize in the war become their own property. This is no robbery, so that they are not bound to restitution. Nevertheless even they who are engaged in a just war may sin in taking spoils through cupidity arising from an evil intention, if, to wit, they fight chiefly not for justice but for spoil. ”

“ Now charity consists principally in the love of God, and secondarily in the love of our neighbor, which is shown in our wishing and doing him well. But theft is a means of doing harm to our neighbor in his belongings; and if men were to rob one another habitually, human society would be undone. Therefore theft, as being opposed to charity, is a mortal sin. ”

“ A man would not act unlawfully if by going beforehand to the play he prepared the way for others: but he acts unlawfully if by so doing he hinders others from going. In like manner a rich man does not act unlawfully if he anticipates someone in taking possession of something which at first was common property, and gives others a share: but he sins if he excludes others indiscriminately from using it. Hence Basil says (Hom. in Luc. xii, 18) : "Why are you rich while another is poor, unless it be that you may have the merit of a good stewardship, and he the reward of patience?" ”

“ Now a thing is more involuntary through violence than through ignorance, because violence is more directly opposed to the will than ignorance. Therefore robbery is a more grievous sin than theft. There is also another reason, since robbery not only inflicts a loss on a person in his things, but also conduces to the ignominy and injury of his person, and this is of graver import than fraud or guile which belong to theft. ”

“ He who by stealth takes his own property which is deposited with another man burdens the depositary, who is bound either to restitution, or to prove himself innocent. Hence he is clearly guilty of sin, and is bound to ease the depositary of his burden. On the other hand he who, by stealth, takes his own property, if this be unjustly detained by another, he sins indeed ”

“ The rich who deem as their own property the common goods they have seized upon, are like to those who by going beforehand to the play prevent others from coming, and appropriate to themselves what is intended for common use. ”

“ Men who adhere to sensible things think more of external strength which is evidenced in robbery, than of internal virtue which is forfeit through sin: wherefore they are less ashamed of robbery than of theft. ”

“ Further, he that takes what is his own does not seem to sin, because he does not act against justice, since he does not destroy its equality. Yet a man commits a theft even if he secretly take his own property that is detained by or in the safe-keeping of another. Therefore it seems that theft is not always a sin. ”

“ Reply to Objection 3: Although more persons may be injured by theft than by robbery, yet more grievous injuries may be inflicted by robbery than by theft: for which reason also robbery is more odious. ”

“ Wherefore the division and appropriation of things which are based on human law, do not preclude the fact that man's needs have to be remedied by means of these very things. Hence whatever certain people have in superabundance is due, by natural law, to the purpose of succoring the poor. ”

“ I answer that, Things which are of human right cannot derogate from natural right or Divine right. Now according to the natural order established by Divine Providence, inferior things are ordained for the purpose of succoring man's needs by their means. ”

“ As regards princes, the public power is entrusted to them that they may be the guardians of justice: hence it is unlawful for them to use violence or coercion, save within the bounds of justice---either by fighting against the enemy, or against the citizens, by punishing evil-doers: and whatever is taken by violence of this kind is not the spoils of robbery, since it is not contrary to justice. On the other hand to take other people's property violently and against justice, in the exercise of public authority, is to act unlawfully and to be guilty of robbery ”

“ Reason accounts as nothing that which is little: so that a man does not consider himself injured in very little matters: and the person who takes such things can presume that this is not against the will of the owner. And if a person take such like very little things, he may be proportionately excused from mortal sin. Yet if his intention is to rob and injure his neighbor, there may be a mortal sin even in these very little things, even as there may be through consent in a mere thought.
Art. 7 - Whether it is lawful to steal through stress of need? ”

“ First because every man is more careful to procure what is for himself alone than that which is common to many or to all: since each one would shirk the labor and leave to another that which concerns the community, as happens where there is a great number of servants. Secondly, because human affairs are conducted in more orderly fashion if each man is charged with taking care of some particular thing himself, whereas there would be confusion if everyone had to look after any one thing indeterminately. ”

“ The second thing that is competent to man with regard to external things is their use. In this respect man ought to possess external things, not as his own, but as common, so that, to wit, he is ready to communicate them to others in their need. ”

“ Nevertheless, if the need be so manifest and urgent, that it is evident that the present need must be remedied by whatever means be at hand (for instance when a person is in some imminent danger, and there is no other possible remedy) , then it is lawful for a man to succor his own need by means of another's property, by taking it either openly or secretly: nor is this properly speaking theft or robbery. ”

“ Further, a man may take by stealth from another, even that which is his own, for instance a thing that he has deposited with another, or that has been taken away from him unjustly. Therefore it is not essential to theft that it should consist in taking another's thing secretly. ”

“ I answer that, Two things are competent to man in respect of exterior things. One is the power to procure and dispense them, and in this regard it is lawful for man to possess property. Moreover this is necessary to human life for three reasons. ”

“ Nothing prevents that which belongs to one person simply, from belonging to another in some respect: thus a deposit belongs simply to the depositor, but with regard to its custody it is the depositary's, and the thing stolen is the thief's, not simply, but as regards its custody.
Art. 4 - Whether theft and robbery are sins of different species? Objection 1: It would seem that theft and robbery are not sins of different species. For theft and robbery differ as "secret" and "manifest": because theft is taking something secretly, while robbery is to take something violently and openly. ”

“ Wherefore they are bound to restitution, just as robbers are, and by so much do they sin more grievously than robbers, as their actions are fraught with greater and more universal danger to public justice whose wardens they are. ”

“ On the other Land the treasure-trove may be nearly in someone's possession: and then if anyone take it with the intention, not of keeping it but of returning it to the owner who does not look upon such things as unappropriated, he is not guilty of theft. In like manner if the thing found appears to be unappropriated, and if the finder believes it to be so, although he keep it, he does not commit a theft [*Inst. II, i, 47] . ”

“ Secondly, as regards their use, and in this way, man has a natural dominion over external things, because, by his reason and will, he is able to use them for his own profit, as they were made on his account: for the imperfect is always for the sake of the perfect, as stated above (Q [64] , A [1] ) . It is by this argument that the Philosopher proves (Polit. i, 3) that the possession of external things is natural to man. ”

“ Since, however, there are many who are in need, while it is impossible for all to be succored by means of the same thing, each one is entrusted with the stewardship of his own things, so that out of them he may come to the aid of those who are in need. ”

“ Now the reason why these people are heretics was because severing themselves from the Church, they think that those who enjoy the use of the above things, which they themselves lack, have no hope of salvation. Therefore it is erroneous to maintain that it is unlawful for a man to possess property. ”

“ The 'Apostolici' are those who with extreme arrogance have given themselves that name, because they do not admit into their communion persons who are married or possess anything of their own, such as both monks and clerics who in considerable number are to be found in the Catholic Church. ”

“ Thirdly, because a more peaceful state is ensured to man if each one is contented with his own. Hence it is to be observed that quarrels arise more frequently where there is no division of the things possessed. ”