Comment: "The state of war is a state

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"The state of war is a state

"The state of war is a state of enmity and destruction: and therefore declaring by word or action, not a passionate and hasty, but a sedate settled design upon another man's life, puts him in a state of war with him against whom he has declared such an intention, and so has exposed his life to the other's power to be taken away by him, or any one that joins with him in his defense, and espouses his quarrel; it being reasonable and just, I should have a right to destroy that which threatens me with destruction: for, by the fundamental law of nature, man being to be preserved as much as possible, when all cannot be preserved, the safety of the innocent is to be preferred: and one may destroy a man who makes war upon him, or has discovered an enmity to his being, for the same reason that he may kill a wolf or a lion; because such men are not under the ties of the common-law of reason, have no other rule, but that of force and violence, and so may be treated as beasts of prey, those dangerous and noxious creatures, that will be sure to destroy him whenever he falls into their power.

And hence it is, that he who attempts to get another man into his absolute power, does thereby put himself into a state of war with him; it being to be understood as a declaration of a design upon his life: for I have reason to conclude, that he who would get me into his power without my consent, would use me as he pleased when he had got me there, and destroy me too when he had a fancy to it; for no body can desire to have me in his absolute power, unless it be to compel me by force to that which is against the right of my freedom, i.e. make me a slave. To be free from such force is the only security of my preservation; and reason bids me look on him, as an enemy to my preservation, who would take away that freedom which is the fence to it; so that he who makes an attempt to enslave me, thereby puts himself into a state of war with me. He that, in the state of nature, would take away the freedom that belongs to any one in that state, must necessarily be supposed to have a foundation of all the rest; as he that in the state of society, would take away the freedom belonging to those of that society or commonwealth, must be supposed to design to take away from them every thing else, and so be looked on as in a state of war.

This makes it lawful for a man to kill a thief, who has not in the least hurt him, nor declared any design upon his life, any farther than, by the use of force, so to get him in his power, as to take away his money, or what he pleases, from him; because using force, where he has no right, to get me into his power, let his pretense be what it will, I have no reason to suppose, that he, who would take away my liberty, would not, when he had me in his power, take away everything else. And therefore it is lawful for me to treat him as one who has put himself into a state of war with me, i.e. kill him if I can; for to that hazard does he justly expose himself, whoever introduces a state of war, and is aggressor in it ..." - John Locke, Of the State of War, The Second Treatise of Civil Government

The basis of self-defense and the public stand your ground law relies upon the person using it not being the aggressor. Trayvon Martin had the right to stand his ground assuming Zimmerman attempted a forcible felony. It doesn't appear that what Zimmerman did in following someone or calling the cops on them because they look suspicious satisfies Zimmerman being the aggressor or the forcible felony.