The third consideration is the degree to which we apprehend that endless chain of causation inevitably demanded by reason, in which each phenomenon comprehended, and therefore man’s every action, must have its definite place as a result of what has gone before and as a cause of what will follow.

The better we are acquainted with the physiological, psychological, and historical laws deduced by observation and by which man is controlled, and the more correctly we perceive the physiological, psychological, and historical causes of the action, and the simpler the action we are observing and the less complex the character and mind of the man in question, the more subject to inevitability and the less free do our actions and those of others appear.

When we do not at all understand the cause of an action, whether a crime, a good action, or even one that is simply nonmoral, we ascribe a greater amount of freedom to it. In the case of a crime we most urgently demand the punishment for such an act; in the case of a virtuous act we rate its merit most highly. In an indifferent case we recognize in it more individuality, originality, and independence. But if even one of the innumerable causes of the act is known to us we recognize a certain element of necessity and are less insistent on punishment for the crime, or the acknowledgment of the merit of the virtuous act, or the freedom of the apparently original action. That a criminal was reared among malefactors mitigates his fault in our eyes. The self-sacrifice of a father or mother, or self-sacrifice with the possibility of a reward, is more comprehensible than gratuitous self-sacrifice, and therefore seems less deserving of sympathy and less the result of free will. The founder of a sect or party, or an inventor, impresses us less when we know how or by what the way was prepared for his activity. If we have a large range of examples, if our observation is constantly directed to seeking the correlation of cause and effect in people’s actions, their actions appear to us more under compulsion and less free the more correctly we connect the effects with the causes. If we examined simple actions and had a vast number of such actions under observation, our conception of their inevitability would be still greater. The dishonest conduct of the son of a dishonest father, the misconduct of a woman who had fallen into bad company, a drunkard’s relapse into drunkenness, and so on are actions that seem to us less free the better we understand their cause. If the man whose actions we are considering is on a very low stage of mental development, like a child, a madman, or a simpleton—then, knowing the causes of the act and the simplicity of the character and intelligence in question, we see so large an element of necessity and so little free will that as soon as we know the cause prompting the action we can foretell the result.

On these three considerations alone is based the conception of irresponsibility for crimes and the extenuating circumstances admitted by all legislative codes. The responsibility appears greater or less according to our greater or lesser knowledge of the circumstances in which the man was placed whose action is being judged, and according to the greater or lesser interval of time between the commission of the action and its investigation, and according to the greater or lesser understanding of the causes that led to the action.

CHAPTER X

Thus our conception of free will and inevitability gradually diminishes or increases according to the greater or lesser connection with the external world, the greater or lesser remoteness of time, and the greater or lesser dependence on the causes in relation to which we contemplate a man’s life.

So that if we examine the case of a man whose connection with the external world is well known, where the time between the action and its examination is great, and where the causes of the action are most accessible, we get the conception of a maximum of inevitability and a minimum of free will. If we examine a man little dependent on external conditions, whose action was performed very recently, and the causes of whose action are beyond our ken, we get the conception of a minimum of inevitability and a maximum of freedom.

In neither case—however we may change our point of view, however plain we may make to ourselves the connection between the man and the external world, however inaccessible it may be to us, however long or short the period of time, however intelligible or incomprehensible the causes of the action may be—can we ever conceive either complete freedom or complete necessity.

(1) To whatever degree we may imagine a man to be exempt from the influence of the external world, we never get a conception of freedom in space. Every human action is inevitably conditioned by what surrounds him and by his own body. I lift my arm and let it fall. My action seems to me free; but asking myself whether I could raise my arm in every direction, I see that I raised it in the direction in which there was least obstruction to that action either from things around me or from the construction of my own body. I chose one out of all the possible directions because in it there were fewest obstacles. For my action to be free it was necessary that it should encounter no obstacles. To conceive of a man being free we must imagine him outside space, which is evidently impossible.

(2) However much we approximate the time of judgment to the time of the deed, we never get a conception of freedom in time. For if I examine an action committed a second ago I must still recognize it as not being free, for it is irrevocably linked to the moment at which it was committed. Can I lift my arm? I lift it, but ask myself: could I have abstained from lifting my arm at the moment that has already passed? To convince myself of this I do not lift it the next moment. But I am not now abstaining from doing so at the first moment when I asked the question. Time has gone by which I could not detain, the arm I then lifted is no longer the same as the arm I now refrain from lifting, nor is the air in which I lifted it the same that now surrounds me. The moment in which the first movement was made is irrevocable, and at that moment I could make only one movement, and whatever movement I made would be the only one. That I did not lift my arm a moment later does not prove that I could have abstained from lifting it then. And since I could make only one movement at that single moment of time, it could not have been any other. To imagine it as free, it is necessary to imagine it in the present, on the boundary between the past and the future—that is, outside time, which is impossible.