In the philosophy of Kant personality was not included among the categories. Renouvier draws up for himself a new list of categories differing from those of Kant. Beginning with Relation they culminate in Personality. These two categories indicate two of the strongholds of Renouvier’s philosophy. Beginning from his fundamental thesis “All is relative,” Renouvier points out that as nothing can possibly be known save by or in a relation of some sort it is evident that the most general law of all is that of Relation itself. Relation is therefore the first and fundamental category embracing all the others. Then follow, Number, Position, Succession, Quality. To these are added the important ones, Becoming, Causality, Finality proceeding from the simple to the composite, from the abstract to the concrete, from the elements most easily selected from our experience to that which embraces the experience itself, Renouvier comes to the final category in which they all find their consummation-Personality. The importance which he attaches to this category colours his entire thought and particularly determines his attitude to the various problems which we shall discuss in our following chapters. As we can think of nothing save in relation to consciousness and consequently we cannot conceive the universe apart from personality, our knowledge of the universe, our philosophies, our beliefs are “personal” constructions. But they need not be on that account merely subjective and individualistic in character, for they refer to personality in its wide sense, a sense shared by other persons. This has important consequences for the problem of certitude in knowledge and Renouvier has here certain affinities to the pragmatist standpoint.