It is not in the matter of education only, that misplaced notions of liberty prevent moral obligations on the part of parents from being recognised, and legal obligations from being imposed, where there are the strongest grounds for the former always, and in many cases for the latter also. The fact itself, of causing the existence of a human being, is one of the most responsible actions in the range of human life. To undertake this responsibility--to bestow a life which may be either a curse or a blessing--unless the being on whom it is to be bestowed will have at least the ordinary chances of a desirable existence, is a crime against that being. And in a country either over-peopled, or threatened with being so, to produce children, beyond a very small number, with the effect of reducing the reward of labour by their competition, is a serious offence against all who live by the remuneration of their labour. The laws which, in many countries on the Continent, forbid marriage unless the parties can show that they have the means of supporting a family, do not exceed the legitimate powers of the state: and whether such laws be expedient or not (a question mainly dependent on local circumstances and feelings), they are not objectionable as violations of liberty. Such laws are interferences of the state to prohibit a mischievous act--an act injurious to others, which ought to be a subject of reprobation, and social stigma, even when it is not deemed expedient to superadd legal punishment. Yet the current ideas of liberty, which bend so easily to real infringements of the freedom of the individual, in things which concern only himself, would repel the attempt to put any restraint upon his inclinations when the consequence of their indulgence is a life, or lives, of wretchedness and depravity to the offspring, with manifold evils to those sufficiently within reach to be in any way affected by their actions. When we compare the strange respect of mankind for liberty, with their strange want of respect for it, we might imagine that a man had an indispensable right to do harm to others, and no right at all to please himself without giving pain to any one.
I have reserved for the last place a large class of questions respecting the limits of government interference, which, though closely connected with the subject of this Essay, do not, in strictness, belong to it. These are cases in which the reasons against interference do not turn upon the principle of liberty: the question is not about restraining the actions of individuals, but about helping them: it is asked whether the government should do, or cause to be done, something for their benefit, instead of leaving it to be done by themselves, individually, or in voluntary combination.