When one of these "mad" worlds encountered a sane world, it would sincerely express the most reasonable and kindly intentions. It desired only cultural intercourse, and perhaps economic cooperation. Little by little it would earn the respect of the other for its sympathy, its splendid social order, and its dynamic purpose. Each world would regard the other as a noble, though perhaps an alien and partly incomprehensible, instrument of the spirit. But little by little the normal world would begin to realize that in the culture of the "mad" world there were certain subtle and far-reaching intuitions that appeared utterly false, ruthless, aggressive, and hostile to the spirit, and were the dominant motives of its foreign relations. The "mad" world, meanwhile, would regretfully come to the conclusion that the other was after all gravely lacking in sensibility, that it was obtuse to the very highest values and most heroic virtues, in fact that its whole life was subtly corrupt, and must, for its own sake, be changed, or else destroyed. Thus each world, though with lingering respect and affection, would sadly condemn the other. But the mad world would not be content to leave matters thus. It would at length with holy fervor attack, striving to destroy the other's pernicious culture, and even exterminate its population. It is easy for me now, after the event, after the final spiritual downfall of these mad worlds, to condemn them as perverts, but in the early stages of their drama we were often desperately at a loss to decide on which side sanity lay.
Several of the mad worlds succumbed to their own fool-hardiness in navigation. Others, under the strain of age-long research, fell into social neurosis and civil strife. A few, however, succeeded in attaining their end, and after voyages lasting for thousands of years were able to reach some neighboring planetary system. The invaders were often in a desperate plight. Generally they had used up most of the material of their little artificial sun. Economy had forced them to reduce their ration of heat and light so far that when at last they discovered a suitable planetary system their native world was almost wholly arctic. On arrival, they would first take up their position in a suitable orbit and, perhaps spend some centuries in recuperating. Then they would explore the neighboring worlds, seek out the most hospitable, and begin to adapt themselves or their descendants to life upon it. If, as was often the case, any of the planets was already inhabited by intelligent beings, the invaders would inevitably come sooner or later into conflict with them, either in a crude manner over the right to exploit a planet's resources, or more probably over the invaders' obsession for propagating their own culture. For by now the civilizing mission, which was the ostensible motive of all their heroic adventures, would have become a rigid obsession. They would be quite incapable of conceiving that the native civilization, though less developed than their own, might be more suited to the natives. Nor could they realize that their own culture, formerly the expression of a gloriously awakened world, might have sunk, in spite of their mechanical powers and crazy religious fervor, below the simpler culture of the natives in all the essentials of mental life.
Many a desperate defense did we see, carried out by some world of the lowly rank of Homo sapiens against a race of mad supermen, armed not only with the invincible power of sub-atomic energy but with overwhelmingly superior intelligence, knowledge, and devotion, and moreover with the immense advantage that all its individuals participated in the unified mind of the race. Though we had come to cherish above all things the advancement of mentality, and were therefore prejudiced in favor of the awakened though perverted invaders, our sympathies soon became divided, and then passed almost wholly to the natives, however barbaric their culture. For in spite of their stupidity, their ignorance, and superstition, their endless internecine conflicts, their spiritual obtuseness and grossness, we recognized in them a power which the others had forfeited, a naive but balanced wisdom, an animal shrewdness, a spiritual promise. The invaders, on the other hand, however brilliant, were indeed perverts. Little by little we came to regard the conflict as one in which an untamed but promising urchin had been set upon by an armed religious maniac.
When the invaders had exploited every world in the new-found planetary system, they would again feel the lust of proselytization. Persuading themselves that it was their duty to advance their religious empire throughout the galaxy, they would detach a couple of planets and dispatch them into space with a crew of pioneers. Or they would break up the whole planetary system, and scatter it abroad with missionary zeal. Occasionally their travel brought them into contact with another race of mad superiors. Then would follow a war in which one side or the other, or possibly both, would be exterminated.
Sometimes the adventurers came upon worlds of their own rank which had not succumbed to the mania of religious empire. Then the natives, though they would at first meet the invaders with courtesy and reason, would gradually realize that they were confronted with lunatics. They themselves would hastily convert their civilization for warfare. The issue would depend on superiority of weapons and military cunning; but if the contest was long and grim, the natives, even if victorious, might be so damaged mentally by an age of warfare that they would never recover their sanity.
Worlds that suffered from the mania of religious imperialism would seek interstellar travel long before economic necessity forced it upon them. The saner world-spirits, on the other hand, often discovered sooner or later a point beyond which increased material development and increased population were unnecessary for the exercise of their finer capacities. These were content to remain within their native planetary systems, in a state of economic and social stability. They were thus able to give most of their practical intelligence to tele-pathic exploration of the universe. Telepathic intercourse between worlds was now becoming much more precise and reliable. The galaxy had emerged from the primitive stage when any world could remain solitary, and live out its career in splendid isolation. In fact, just as, in the experience of Homo sapiens, the Earth is now "shrinking" to the dimensions of a country, so, in this critical period of the life of our galaxy, the whole galaxy was "shrinking" to the dimensions of a world. Those world spirits that had been most successful in telepathic exploration had by now constructed a fairly accurate "mental map" of the whole galaxy, though there still remained a number of eccentric worlds with which no lasting contact could yet be made. There was also one very advanced system of worlds, which had mysteriously "faded out" of telepathic intercourse altogether. Of this I shall tell more in the sequel.
The telepathic ability of the mad worlds and systems was by now greatly reduced. Though they were often under telepathic observation by the more mature world spirits, and were even influenced to some extent, they themselves were so self-complacent that they cared not to explore mental life of the galaxy. Physical travel and sacred imperial power were for them good enough means of intercourse with the surrounding universe.
In time there grew up several great rival empires of the mad worlds, each claiming to be charged with some sort of divine mission for the unifying and awakening of the whole galaxy. Between the ideologies of these empires there was little to choose, yet each was opposed to the others with religious fervor. Germinating in regions far apart, these empires easily mastered any sub-utopian worlds that lay within reach. Thus they spread from one planetary system to another, till at last empire made contact with empire.