=Can a Man have Double Citizenship?=—Is it possible for anyone to be a citizen of two countries at once? Until recent years it was the practice of some European countries to claim that when their citizens emigrated and became naturalized elsewhere they still retained their original allegiance. Germany, for example, maintained that German emigrants to the United States did not lose their German citizenship by becoming naturalized here. If they subsequently returned to Germany, even for a short time, they were treated as German citizens, required to serve in the army and to perform the other obligations of German citizenship. This situation created a great deal of friction because the naturalized citizens were in the habit of calling upon the United States to protect them against their own original governments. All this has now been straightened out by treaties between the United States and foreign governments in which the latter have conceded the right of emigrants to become naturalized in the United States and by so doing to renounce their original citizenship. The United States, for its part, also concedes the right of any American citizen to become naturalized in a foreign country, thereby renouncing his allegiance as an American citizen. These treaties sometimes provide, however, that if an individual who has been naturalized in the United States goes back to his native country and remains there a certain length of time, he shall be deemed to have given up his American citizenship. [Sidenote: The specific duties of citizens.] =The Obligations of Citizenship.=—Many people seem to think that citizenship involves only rights. They rarely place much emphasis upon the _duties_ which citizenship involves. A government protects its citizens both at home and abroad; it secures them all the benefits of civil liberty. In return it lays on them the duty of obedience and the obligation of service. It is the duty of every good citizen to know his country’s history, to honor its flag, and to be true to its ideals. This does not mean that he should despise or dislike people who are not of his own race or allegiance. All men are brothers. Above all nations is humanity. Yet no one can be a friend of mankind unless he is, first of all, a friend of his own land.