In the foregoing chapter we have noted the great fact that the leading modern nations of Western Europe have shown a much greater capacity for progress than all the earlier civilised peoples, not excepting those of ancient Greece and Rome. I urged that this difference between the ancient and the modern European civilisations seemed to be chiefly due to a difference of social organisation. I pointed out how the older nations were essentially caste nations, resting on a basis of slavery, and how all individual rights were entirely subordinated to the welfare of the State, a politico-religious organisation held together by the bond of kinship; how, within that organisation, the rights of each person were strictly defined throughout his life by the status to which he was born; and how all persons outside this organisation were regarded as natural enemies, towards whom no obligations of any kind were felt. We have now to notice that the form of social organisation towards which all the leading modern nations have been tending, and which some of them have now pretty well achieved, is one in which the last vestiges of the caste system and the rigid bonds of customary status are rapidly being abolished. In this new organisation social classes persist, but they are no longer castes; all members of the nation are regarded as being by nature free and equal; a career is open to every talent, and any man may rise to any position by the exertion of his abilities. His position is one of extreme liberty as compared with that of any member of the ancient nations. He has definite rights as against the State. The State claims only a minimum of rights over him, the right to prevent him interfering with the rights of his fellow-citizens, the right to make him pay for his share of the privileges conveyed by its activities. And these rights it claims in virtue of contract between each citizen and all the rest. For each citizen is free to throw off his allegiance to the State and to leave it at will, and his continuance as a citizen of the State implies his acceptance of the contract. Even in religion, personal liberty has at last been achieved; religion is no longer a State-religion, the gods are no longer the national gods, and each man may accept any religion or none. This is the most striking instance of the immense distance, as regards the liberty of the individual, that divides the modern from the ancient nations. For with the latter, the function of religion was to preserve the security of the State; and to question it in any way was to threaten the State, a principle fully acted upon by Athens in the time of her highest enlightenment and glory.