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Let us consider another form of physical justice: heredity. There again we find the same indifference to moral causes. And truly it were a strange justice indeed that would throw upon the son, and even the remote descendant, the burden of a fault committed by his father or his ancestor. But human morality would raise no objection: man would not protest. To him it would seem natural, magnificent, even fascinating. It would indefinitely prolong his individuality, his consciousness and existence; and from this point of view would accord with a number of indisputable facts which prove that we are not wholly self-contained, but connect, in more than one subtle, mysterious fashion, with all that surrounds us in life, with all that precedes us, or follows.

And yet, true as this may be in certain cases, it is not true as regards the justice of physical heredity, which is absolutely indifferent to the moral causes of the deed whose consequences the descendants have to bear. There is physical relation between the act of the father, whereby he has undermined his health, and the consequent suffering of the son; but the son’s suffering will be the same whatever the intentions or motives of the father, be these heroic or shameful. And, further, the area of what we call the justice of physical heredity would appear to be very restricted. A father may have been guilty of a hundred abominable crimes, he may have been a murderer, a traitor, a persecutor of the innocent or despoiler of the wretched, without these crimes leaving the slightest trace upon the organism of his children. It is enough that he should have been careful to do nothing that might injure his health.

So much for the justice of Nature as shown in physical heredity. Moral heredity would appear to be governed by similar principles; but as it deals with modifications of the mind and character infinitely more complex and more elusive, its manifestations are less striking, and its results less certain. Pathology is the only region which admits of its definite observation and study; and there we observe it to be merely the spiritual form of physical heredity, which is its essential principle: moral heredity being only a sequel, and revealing in its elementary stage the same indifference to real justice, and the same blindness. Whatever the moral cause of the ancestor’s drunkenness or debauch, the same punishment may be meted out in mind and body to the descendants of the drunkard or the debauchee. Intellectual blemish will almost always accompany material blemish. The soul will be attacked simultaneously with the body; and it matters but little whether the victim be imbecile, mad, epileptic, possessed of criminal instincts, or only vaguely threatened with slight mental derangement: the most frightful moral penalty that a supreme justice could invent has followed actions which, as a rule, cause less harm and are less perverse than hundreds of other offences that Nature never dreams of punishing. And this penalty, moreover, is inflicted blindly, not the slightest heed being paid to the motives underlying the actions, motives that may have been excusable perhaps, or indifferent, or possibly even admirable.

It would be absurd, however, to imagine that drunkenness and debauchery are the only agents in moral heredity. There are a thousand others, all more or less unknown. Certain moral qualities appear to be transmitted as readily as though they were physical. In one race, for instance, we will almost constantly discover certain virtues which have probably been acquired. But who shall say how much is due to heredity, and how much to environment and example? The problem becomes so complicated, the facts so contradictory, that it is impossible, amidst the mass of innumerable causes, to follow the track of one particular cause to the end. Let it suffice to say that in the only clear, striking, definitive cases where an intentional justice could have revealed itself in physical or moral heredity, no trace of justice is found. And if we do not find it in these, we are surely far less likely to find it in others.