In all these respects, it should be observed, the naïvely realistic thought of the pre-scientific mind treats what from a more developed point of view would be distinguished as mental and physical existences alike. Human persons, like the other things of which my environment is composed, are thought of as being at once units and the possessors of diverse properties, as capable of a variety of relations to one another and to other things, and as interacting with each other and the rest of the environment. The recognition of the psychical as an order distinct from the physical, with its momentous consequences for general metaphysical theory, belongs to a later and much more sophisticated stage of intellectual development. Also, it must be noted, for the naïvely realistic intelligence, I am myself thought of as simply one object or thing in an environment of things of a similar nature, and my relations to that environment are conceived as being of the same type as the relations between its various component parts. I too am, for my own thought, so long as it remains at this primitive level, simply a thing with numerous properties, in various relations to other things, and interacting with them in diverse ways.[73] We have called this exceedingly primitive way of conceiving the nature of existence “pre-scientific,” on the ground that both in the mental development of the individual and in that of a community of individuals it precedes even the most tentative conscious efforts to organise thought about the world into a coherent whole. All scientific and philosophical constructions may be regarded as so many artificial modifications of this earlier point of view, instituted and carried out for the purpose of rendering it more coherent and systematic. At the same time, our use of the epithet “pre-scientific” must not be allowed to mislead. The “pre-scientific” view may and does co-exist in the same mind with the various modifications of it which arise in the effort to think consistently. We are all of us habitually “naïve realists” in respect of those aspects of the world of experience which lie outside the limits of our personal scientific studies; and even as regards those aspects of existence in respect of which our theoretical views may be of a much more developed type, we habitually relapse into the “pre-scientific” attitude when our immediate object is practical[74] success in action rather than logical consistency in thinking. For the purposes of everyday life, the most “advanced” man of science is content to be a naïve realist outside his laboratory.