_Treatment of Citizens of Other States._--Still another obligation imposed by the Federal Constitution on the states is that of treating the citizens of other states as they treat their own citizens, i. e., without discrimination. But this obligation has reference rather to civil rights than to political privileges. It does not mean that an illiterate man who is allowed to vote in Illinois may go to Massachusetts and vote where an educational qualification for the suffrage is required; nor does it mean that a woman who is allowed to practice law in one state may therefore practice in another state which excludes women from engaging in that profession. What the provision does mean, is that whatever privileges and immunities a state allows to its own citizens, it must allow the citizens of other states on the same terms, and subject to the same conditions and no more. Thus a state cannot subject the citizens of other states to higher taxes than are imposed upon its own citizens. _Other Obligations._--Finally, it goes without saying that it is the duty of each state to treat its sister states in the spirit of comity and courtesy; to carry out the mandates of the Federal Constitution relating to the election of senators, representatives, and presidential electors so as to keep up the existence of the national government; and, in general, to perform in good faith all their other obligations as members of the union, without the performance of which the republic would be a mere makeshift. The existence of the states is essential to the union, and their preservation is as much within the care of the Constitution as is the union itself. Indeed, the Constitution in all its parts, said the Supreme Court of the United States in a famous case, looks to an indestructible union of indestructible states. =The State Constitution; how Framed.=--The governmental organization of each of the states is set forth in a written instrument called a constitution. Unlike the constitutions of some of the European states, which were granted by kings, and unlike, also, those of the British self-governing colonies, which were enacted by Parliament, all the American constitutions now in existence were framed by constituent bodies representing the people, and in most cases they were approved by the people before they went into effect. As Mr. Bryce has remarked, the American state constitutions are the oldest things in the political history of America. Before the Federal Constitution was framed each of the thirteen original states had a constitution of its own, most of them being framed by popular conventions chosen especially for the purpose.