The Physiocrats, as we have seen, had introduced the idea of there being a natural order in social circumstances, that order being natural which is most advantageous to mankind. Turgot had declared that one age is bound to another by a chain of causation. Condorcet fused these two conceptions. He viewed the history of the ages as a whole, and found in their succession a natural order; an order which, when uninterrupted and undisturbed, tended to accumulate untold advantages upon the human race, which was every day becoming more plain to the vision of men, and therefore every day more and more assured from disturbance by ignorant prejudice and sinister interests. There is an order at once among the circumstances of a given generation, and among the successive sets of circumstances of successive generations. 'If we consider the development of human faculties in its results, so far as they relate to the individuals who exist at the same time on a given space, and if we follow that development from generation to generation, then we have before us the picture of the progress of the human mind. This progress is subject to the same general laws that are to be observed in the development of the faculties of individuals, for it is the result of that development, considered at the same time in a great number of individuals united in society. But the result that presents itself at any one instant depends upon that which was offered by the instants preceding; in turn it influences the result in times still to follow.' This picture will be of a historical character, inasmuch as being subject to perpetual variations it is formed by the observation in due order of different human societies in different epochs through which they have passed. It will expose the order of the various changes, the influence exercised by each period over the next, and thus will show in the modifications impressed upon the race, ever renewing itself in the immensity of the ages, the track that it has followed, and the exact steps that it has taken towards truth and happiness. Such observation of what man has been and of what he is, will then lead us to means proper for assuring and accelerating the fresh progress that his nature allows us to anticipate still further.[56]