The right of the states to levy progressive and unequal taxes on inheritances and testamentary dispositions is frequently sought to be upheld upon the theory that the power of our legislatures over successions to the property of decedents is unlimited, that the right to succeed is a mere statutory privilege, and that our lawmakers may arbitrarily grant or withhold that privilege at their will and discretion. It is, however, far from established that any such arbitrary and unrestrained power is vested in our state legislatures as that of denying wholly the right of inheritance or of testamentary disposition, or of discriminating in the regulation or grant of the privilege. The power to regulate the exercise of any right does not necessarily imply the power to deny it altogether. All rights of property as well as of personal liberty are subject to reasonable regulation, but this does not involve the power absolutely or arbitrarily to destroy such rights. The right of inheritance by children was not originally the creation of statute law at all, although the contrary is often assumed. It was a customary right long before the Conquest and prior to any statute of which we have record. It is treated by legal historians as "our common law of inheritance." In the latest authoritative history of the English law, that by Pollock and Maitland, the authors say that "in calling to our aid a law of intestate succession, we are not invoking a modern force," and that "the time when no such law existed is in strictest sense a prehistoric time." We find that it was a right already established in every one of the thirteen original states at the time the national government was founded; that it has always existed in civilized countries, so far as we have any knowledge; that it was recognized in the Twelve Tables as a right among the Romans; that it was a right long before among the Egyptians, and that it pervades the Mosaic law. A distinguished writer declares it to be the general direction of Providence itself. And Chancellor Kent said that "nature and policy have equally concurred to introduce and maintain this primary rule of inheritance in the laws and usage of all civilized nations." The power of testamentary disposition undoubtedly developed as a limitation upon the right of inheritance and in order to prevent escheat for want of heirs. But however originating or evidenced--whether in old customs or in the practice of _post-obit_ gifts--the right has been recognized from time immemorial. As Blackstone said in his "Commentaries," "in England this power of bequeathing is coeval with the first rudiments of the law, for we have no traces or memorials of any time when it did not exist."