The evolution of each ego, of each entity conscious of a personal "I," passes through three stages through immense periods of time. In the first and earliest stage, it unfolds its distinct physical selfhood, acquires more and more consciousness of the personal "I," and hence divides and isolates itself from other egos. It seeks to differentiate itself from them. It feels the need to assert itself and its interests. This leads inevitably to antagonism towards them. Its movement is towards externality, a movement which must inevitably end in its taking the surface or appearance of things for reality, that is, in materialism. Here it is acquisitive. In its second and intermediate stage, it unfolds its mental selfhood and hence adds cunning to its separative and grasping tendencies, with intellect expanding to its extremest point. Here it is inquisitive. But midway in this stage, its descent comes to an end with a turning point where it halts, turns around, and begins to travel backward to its original source. In the third and last stage, the return towards its divine source continues. Its movement is now toward internality and--through meditation, investigation, and reflection--it ultimately achieves knowledge of its true being: its source, the Overself. And as all egos arise out of the Overself, the end of such a movement is one and the same for all--a common centre. Conflicts between them cease; mutual understanding, co-operation, and compassion spread. Hence, this stage is unitive.
The central point of the entire evolution is about where we now stand. Human attitudes and relations have reached their extreme degree of selfishness, separateness, struggle, and division, have experienced the resulting exhaustion of an unheard-of world crisis, but are beginning to reorient themselves towards an acknowledgment of the fundamental unity of the whole race. Thus, war reaches its most violent and terrible phase in the second stage and then abruptly begins to vanish from human life altogether. The separatist outlook must cease. Most of our troubles have arisen because we have continued it beyond the point where it was either useful or needful.
The unequal state of evolution of all these egos, when thrown together into a conglomerate group on a single planet, is also responsible for the conflicts which have marked mankind's own history. They stand on different steps of the ladder all the way from savagery to maturity. The backward ego naturally attacks or preys on the advanced one. Thus, the purely self-regarding ego, which was once an essential pattern of the evolutionary scheme--a necessary goal in the movement of life--becomes with time a discordant ingredient of that scheme, an obstructive impediment to that movement. If humanity is to travel upward and fulfil its higher destiny, it can do so only by enlarging its area of interest and extending its field of consciousness. It must, in short, seek to realize the Overself on the one hand, to feel its oneness on the other.
-- Notebooks Category 11: The Negatives > Chapter 2: Their Roots in Ego > # 4