When we ask what are the marks by which one thing may be shown to be more of a true individual whole than another, we shall find that they may be reduced to two, both of which we can easily see to be in principle the same, though, owing to the limitations of our insight, they do not always appear to coincide in a given case. One thing is _ceteris paribus_ more truly an individual whole than another: (1) when the wealth of detailed content it embraces is greater; (2) when the completeness of the unity with which it embraces that detail is greater. Or, the degree of individuality possessed by any system depends: (1) on its _comprehensiveness_; (2) on its _internal systematisation_. The more a thing includes of existence and the more harmoniously it includes it, the more individual it is. It is manifest, of course, that these two characteristics of a systematic whole are mutually interdependent. For, precisely because all Reality is ultimately a single coherent system, the more there is outside any partial system the greater must be the dependence of its constituents for their character upon their connection with reality outside, and the less capable must the system be of complete explanation from within itself. The more the partial system embraces, the less will its constituents be determined by relation to anything outside itself, and the more completely will its organisation be explicable by reference to its own internal principle of structure. That is, the greater the comprehensiveness of the system, the completer in general will be its internal coherence. And, conversely, the more completely the working of the whole system in its details is explicable from within as the expression of a single principle of internal structure, the less must be the dependence of its contents on any external reality; and therefore, seeing that _all_ reality is ultimately interconnected, the less must be the extent of what lies outside the system in question. That is, the greater the internal unity, the greater in general the comprehensiveness of the system. Thus ultimately the two criteria of individuality coincide.