Thanks to these three great discoveries and the resultant powerful advance of science, we have now arrived at a point where we can show the connection between changes in nature, not only in specific cases, but also in the relation of the specific cases to the whole and so give a bird's eye view of the interrelation of nature in an approximately scientific form by means of the facts shown by empirical science itself. To furnish this complete picture was formerly the task of the so-called philosophy of nature. It could then only do this by substituting ideal and imaginary hypotheses for the unknown real interconnection, by filling out the missing facts with mind-pictures and by bridging the chasms by empty imaginings. It had many happy thoughts in these transports (of imagination), it anticipated many later discoveries, but it also caused the survival of considerable nonsense up to the present time which could not otherwise have been possible. At present, when the results of the investigation of nature need only be conceived of dialectically, that is in the sense of their mutual interconnection, to arrive at a system of nature sufficient for our time, when the dialectical character of this interconnection forces itself into the metaphysically trained minds of experimental scientists, against their will, today a philosophy of nature is finally disposed of, every attempt at its resurrection would not only be superfluous, it would even be a step backwards. But what is true of nature, which is hereby recognized as an historical process, is true also of the history of society in all its branches, and of the totality of all sciences which occupy themselves with things human and divine. Here also the philosophy of jurisprudence, of history, of religion, etc., consisted in this, that in place of the true interconnection of events, one originating in the mind of the philosopher was substituted; that history, in its totality as in its parts, was comprehended as the gradual realization of ideas, but, of course, always of the pet idea of the philosopher himself. History worked up to now, unconsciously but necessarily, towards a certain predetermined, fixed, ideal goal, as for example in the case of Hegel, towards the realization of his Absolute Idea, and the unalterable trend towards this Absolute Idea constituted the inward connection of historic facts. In the place of the real, and up to this time unknown, interrelation, man set a new mysterious destiny, unconscious or gradually coming into consciousness. It was necessary in this case, therefore, just as in the realm of nature, to set aside these artificial interrelations by the discovery of the real, a task which finally culminated in the discovery of the universal laws of progress, which established themselves as the dominating ones in the history of human society.