But when we look closer at the relation thus constituted between Ethics and Politics, we see that a distinction has to be taken between actual or Positive Law and Ideal Law or Law as it ought to be. It is for the latter that Political Theory lays down principles; but it is Positive, not Ideal, Law that primarily determines right conduct for an individual here and now, in the manner just exemplified. No doubt if Positive and Ideal Law appear to me to diverge very widely--if (_e.g._) I am convinced by political theory that a fundamental change in the law of property is desirable--this conviction is likely to influence my view of my moral duty under the existing law; but the extent of this influence is vague and uncertain. Suppose I am a slave-owner in a society in which slavery is established, and become convinced that private property in human beings should be abolished by law: it does not therefore follow that I shall regard it as my moral duty to set free my slaves at once. I may think immediate general abolition of slavery not only hopeless, but even inexpedient for the slaves themselves, who require a gradual education for freedom: so that it is better for the present to aim at legal changes that would cut off the worst evils of slavery, and meanwhile to set an example of humane and considerate treatment of bondsmen. Similar reasonings might be applied to the abolition of private property in the instruments of production, or in appointments to offices, civil or ecclesiastical. Speaking generally, the extent to which political ideals ought to influence moral duty would seem to depend partly on the apparent remoteness or nearness of the prospect of realising the ideal, partly on its imperativeness, or the expediency of immediate realisation: and the force attached to both these considerations is likely to vary with the political method adopted; so that it belongs to Politics rather than Ethics to determine them more precisely.