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Nature and rights, ancient and modern

PHIL 202, Modern philosophy, Fall 2026

1 Introduction

The Valladolid debate rests, fundamentally, on a question of application or determination. It is, in short, whether indigenous Americans are Aristotelian natural slaves. Las Casas thinks no; Sepulveda thinks yes. Note that the existence, in principle, of such individuals is not questioned by either. Las Casas does not deny that there are or may be natural slaves; he denies just that the category is not applicable to indigenous Americans.

To get the broader context of the Valladolid debate, I want to look at two sets of texts:

  • Some passages from Aristotle’s Politics: Aristotle’s natural slave argument is one consequence of his political naturalism. I want to read through some passages from Aristotle that will help us make sense of this background.
  • Some passages from Hobbes’ Leviathan (1651; a full century after the Valladolid debate): In Hobbes we find a complete departure from Aristotelian (or more broadly classical) political philosophy, and in terms of both:
    • the naturalism of political community in general, and
    • the naturalness of ruler and ruler (and of master and slave).

2 Aristotle, Politics

2.1 The natural city and the natural citizen

  • Pol. I.2: The city exists by nature, and humans are by nature political

He who thus considers things in their first growth and origin, whether a state or anything else, will obtain the clearest view of them. In the first place there must be a union of those who cannot exist without each other; namely, of male and female, that the race may continue (and this is a union which is formed, not of deliberate purpose, but because, in common with other animals and with plants, mankind have a natural desire to leave behind them an image of themselves), and of natural ruler and subject, that both may be preserved. For that which can foresee by the exercise of mind is by nature intended to be lord and master, and that which can with its body give effect to such foresight is a subject, and by nature a slave . . . .

Out of these two relationships between man and woman, master and slave, the first thing to arise is the family . . . .

The family is the association established by nature for the supply of men’s everyday wants . . . . But when several families are united, and the association aims at something more than the supply of daily needs, the first society to be formed is the village. . . .

When several villages are united in a single complete community, large enough to be nearly or quite self-sufficing, the state comes into existence, originating in the bare needs of life, and continuing in existence for the sake of a good life. And therefore, if the earlier forms of society are natural, so is the state, for it is the end of them, and the nature of a thing is its end. For what each thing is when fully developed, we call its nature, whether we are speaking of a man, a horse, or a family. Besides, the final cause and end of a thing is the best, and to be self-sufficing is the end and the best.

Hence it is evident that the state is a creation of nature, and that man is by nature a political animal. And he who by nature and not by mere accident is without a state, is either a bad man or above humanity . . . . Now, that man is more of a political animal than bees or any other gregarious animals is evident. Nature, as we often say, makes nothing in vain, and man is the only animal whom she has endowed with the gift of speech. And whereas mere voice is but an indication of pleasure or pain, and is therefore found in other animals (for their nature attains to the perception of pleasure and pain and the intimation of them to one another, and no further), the power of speech is intended to set forth the expedient and inexpedient, and therefore likewise the just and the unjust. And it is a characteristic of man that he alone has any sense of good and evil, of just and unjust, and the like, and the association of living beings who have this sense makes a family and a state.

2.2 The natural slave

  • Pol. I.4: First ingredient

he who is by nature not his own but another’s man, is by nature a slave; and he may be said to be another’s man who, being a human being, is also a possession

  • Pol. I.5: Second ingredient

Where then there is such a difference as that between soul and body, or between men and animals (as in the case of those whose business is to use their body, and who can do nothing better), the lower sort are by nature slaves, and it is better for them as for all inferiors that they should be under the rule of a master. For he who can be, and therefore is, another’s and he who participates in rational principle enough to apprehend, but not to have, such a principle, is a slave by nature.

3 Hobbes, Leviathan

3.1 The artificiality of political community

  • Leviathan introduction: (Note the transformation in the meaning of ‘nature’)

Nature (the art whereby God hath made and governes the world) is by the art of man, as in many other things, so in this also imitated, that it can make an Artificial Animal. For seeing life is but a motion of Limbs, the begining whereof is in some principall part within; why may we not say, that all Automata (Engines that move themselves by springs and wheeles as doth a watch) have an artificiall life? For what is the Heart, but a Spring; and the Nerves, but so many Strings; and the Joynts, but so many Wheeles, giving motion to the whole Body, such as was intended by the Artificer? Art goes yet further, imitating that Rationall and most excellent worke of Nature, Man. For by Art is created that great LEVIATHAN called a COMMON-WEALTH, or STATE, (in latine CIVITAS) which is but an Artificiall Man; though of greater stature and strength than the Naturall, for whose protection and defence it was intended; and in which, the Soveraignty is an Artificiall Soul, as giving life and motion to the whole body;

3.2 Natural equality and war

  • Leviathan XIII: [If cities are not natural products, then there are no natural rulers or subjects, hence political inequality and authority are artificial, and] By nature all are equal

Nature hath made men so equall, in the faculties of body, and mind; as that though there bee found one man sometimes manifestly stronger in body, or of quicker mind then another; yet when all is reckoned together, the difference between man, and man, is not so considerable, as that one man can thereupon claim to himselfe any benefit, to which another may not pretend, as well as he. For as to the strength of body, the weakest has strength enough to kill the strongest, either by secret machination, or by confederacy with others, that are in the same danger with himselfe.

And as to the faculties of the mind, (setting aside the arts grounded upon words, and especially that skill of proceeding upon generall, and infallible rules, called Science; which very few have, and but in few things; as being not a native faculty, born with us; nor attained, (as Prudence,) while we look after somewhat els,) I find yet a greater equality amongst men, than that of strength. For Prudence, is but Experience; which equall time, equally bestowes on all men, in those things they equally apply themselves unto. That which may perhaps make such equality incredible, is but a vain conceipt of ones owne wisdome, which almost all men think they have in a greater degree, than the Vulgar; that is, than all men but themselves, and a few others, whom by Fame, or for concurring with themselves, they approve. For such is the nature of men, that howsoever they may acknowledge many others to be more witty, or more eloquent, or more learned; Yet they will hardly believe there be many so wise as themselves: For they see their own wit at hand, and other mens at a distance. But this proveth rather that men are in that point equall, than unequall. For there is not ordinarily a greater signe of the equall distribution of any thing, than that every man is contented with his share.

  • Leviathan XIII: Continuation: From equality comes war

From this equality of ability, ariseth equality of hope in the attaining of our Ends. And therefore if any two men desire the same thing, which neverthelesse they cannot both enjoy, they become enemies; and in the way to their End, (which is principally their owne conservation, and sometimes their delectation only,) endeavour to destroy, or subdue one an other. And from hence it comes to passe, that where an Invader hath no more to feare, than an other mans single power; if one plant, sow, build, or possesse a convenient Seat, others may probably be expected to come prepared with forces united, to dispossesse, and deprive him, not only of the fruit of his labour, but also of his life, or liberty. And the Invader again is in the like danger of another. . . . Hereby it is manifest, that during the time men live without a common Power to keep them all in awe, they are in that condition which is called Warre; and such a warre, as is of every man, against every man. For WARRE, consisteth not in Battell onely, or the act of fighting; but in a tract of time, wherein the Will to contend by Battell is sufficiently known: and therefore the notion of Time, is to be considered in the nature of Warre; as it is in the nature of Weather. For as the nature of Foule weather, lyeth not in a showre or two of rain; but in an inclination thereto of many dayes together: So the nature of War, consisteth not in actuall fighting; but in the known disposition thereto, during all the time there is no assurance to the contrary. All other time is PEACE.

3.3 Modern natural (inalienable) rights

  • Leviathan XIV

Whensoever a man Transferreth his Right, or Renounceth it; it is either in consideration of some Right reciprocally transferred to himselfe; or for some other good he hopeth for thereby. For it is a voluntary act: and of the voluntary acts of every man, the object is some Good To Himselfe. And therefore there be some Rights, which no man can be understood by any words, or other signes, to have abandoned, or transferred. As first a man cannot lay down the right of resisting them, that assault him by force, to take away his life; because he cannot be understood to ayme thereby, at any Good to himselfe. The same may be sayd of Wounds, and Chayns, and Imprisonment; both because there is no benefit consequent to such patience; as there is to the patience of suffering another to be wounded, or imprisoned: as also because a man cannot tell, when he seeth men proceed against him by violence, whether they intend his death or not. And lastly the motive, and end for which this renouncing, and transferring or Right is introduced, is nothing else but the security of a mans person, in his life, and in the means of so preserving life, as not to be weary of it. And therefore if a man by words, or other signes, seem to despoyle himselfe of the End, for which those signes were intended; he is not to be understood as if he meant it, or that it was his will; but that he was ignorant of how such words and actions were to be interpreted. . . . A Covenant not to defend my selfe from force, by force, is alwayes voyd. For (as I have shewed before) no man can transferre, or lay down his Right to save himselfe from Death, Wounds, and Imprisonment, (the avoyding whereof is the onely End of laying down any Right,) and therefore the promise of not resisting force, in no Covenant transferreth any right; nor is obliging. For though a man may Covenant thus, “Unlesse I do so, or so, kill me;” he cannot Covenant thus “Unless I do so, or so, I will not resist you, when you come to kill me.” For man by nature chooseth the lesser evill, which is danger of death in resisting; rather than the greater, which is certain and present death in not resisting. And this is granted to be true by all men, in that they lead Criminals to Execution, and Prison, with armed men, notwithstanding that such Criminals have consented to the Law, by which they are condemned.

3.4 Rejection of the Aristotelian natural slave argument

  • Leviathan XV

The question who is the better man, has no place in the condition of meer Nature; where, (as has been shewn before,) all men are equall. The inequallity that now is, has been introduced by the Lawes civill. I know that Aristotle in the first booke of his Politiques, for a foundation of his doctrine, maketh men by Nature, some more worthy to Command, meaning the wiser sort (such as he thought himselfe to be for his Philosophy;) others to Serve, (meaning those that had strong bodies, but were not Philosophers as he;) as if Master and Servant were not introduced by consent of men, but by difference of Wit; which is not only against reason; but also against experience. For there are very few so foolish, that had not rather governe themselves, than be governed by others: Nor when the wise in their own conceit, contend by force, with them who distrust their owne wisdome, do they alwaies, or often, or almost at any time, get the Victory. If Nature therefore have made men equall, that equalitie is to be acknowledged; or if Nature have made men unequall; yet because men that think themselves equall, will not enter into conditions of Peace, but upon Equall termes, such equalitie must be admitted. And therefore for the ninth Law of Nature, I put this, “That every man acknowledge other for his Equall by Nature.” The breach of this Precept is Pride.