This extension of Liberalism from individuals to nations is easy as a mental process, but very far from easy as a matter of practical politics. Nationality is not difficult to define in general terms. It is sometimes infinitely difficult to decide in a particular case whether the general definition applies. John Stuart Mill has perhaps given as much precision to the Liberal conception of nationality as it can bear. "A portion of mankind may be said {13} to constitute a nation if they are united among themselves by common sympathies which do not exist between them and others. This feeling of nationality may have been generated by various causes. Sometimes it is the effect of identity of race and descent. Community of language and community of religion greatly contribute to it. Geographical limits are one of the causes. But the strongest of all is identity of political antecedents, the possession of a national history and consequent community of recollections, collective pride and humiliation, pleasure and regret, connected with the same incidents in the past."[6] Nationality is not a thing of sharp outline, any more than any other political conception, and community of interest, the management of common concerns over a long period of time, has triumphed over differences so potent as those of race and creed. Such has been the fortune of Switzerland, of Canada, and of white South Africa, and it is the hope of Liberalism that such will also be the fortune of Ireland. Without attempting to draw hard lines between communities, the Liberal sees in them distinctions of worth and capacity such as he sees in individuals, and he would give the same freedom of self-development to a nation as to a human being. The idea that nations are to be bound by moral rules as much as individuals is only another application of the general rule that one man is to be treated as equally entitled with every other to the development of his own faculties. The same rule is extended to nations as to single persons. No one people has the right to interfere with the free development of another, until it is clearly and unmistakably proved that that free development will be generally injurious. Once this principle is accepted, it becomes impossible, as in the case of single persons, for one nation to decline to recognize moral rules in its dealings with others. Morality is nothing but the subjection of individual wills to the common will, as expressed in defined rules. Immorality is only the arrogance of the individual will, refusing to submit itself to general rules, while it endeavours to enforce general rules upon {14} others. The Liberal State is that which recognizes the universal application of its own principles of conduct, declines to thrust its own ideas upon unwilling associates, and works in harmony with other races instead of in opposition to them.