Four centuries passed, and then again the Martian clouds appeared in the sky. Once more devastation and slaughter. Once more a complete failure of the two mentalities to conceive one another. Once more the Martians were destroyed. Once more the pulmonary plague, the slow purging, a crippled population, and generous suicide.
Again, and again they appeared, at irregular intervals for fifty thousand years. On each occasion the Martians came irresistibly fortified against whatever weapon humanity had last used against them. And so, by degrees, men began to recognize that the enemy was no merely instinctive brute, but intelligent. They therefore made attempts to get in touch with these alien minds, and make overtures for a peaceful settlement. But since obviously the negotiations had to be performed by human beings, and since the Martians always regarded human beings as the mere cattle of the terrestrial intelligence, the envoys were always either ignored or destroyed.
During each invasion the Martians contrived to dispatch a considerable bulk of water to Mars. And every time, not satisfied with this material gain, they stayed too long crusading, until man had found a weapon to circumvent their new defences; and then they were routed. After each invasion man’s recovery was slower and less complete, while Mars, in spite of the loss of a large proportion of its population, was in the long run invigorated with the extra water.
II
The Ruin of Two Worlds
Rather more than fifty thousand years after their first appearance, the Martians secured a permanent footing on the Antarctic tableland and overran Australasia and South Africa. For many centuries they remained in possession of a large part of the earth’s surface, practising a kind of agriculture, studying terrestrial conditions, and spending much energy on the “liberation” of diamonds.
During the considerable period before their settlement their mentality had scarcely changed; but actual habitation of the earth now began to undermine their self-complacency and their unity. It was borne in upon certain exploring Martians that the terrestrial bipeds, though insensitive to radiation, were actually the intelligences of the planet. At first this fact was studiously shunned, but little by little it gripped the attention of all terrestrial Martians. At the same time they began to realize that the whole work of research into terrestrial conditions, and even the social construction of their colony, depended, not on the public mind, but on private individuals, acting in their private capacity. The colonial super-individual inspired only the diamond crusade, and the attempt to extirpate the terrestrial intelligence, or radiation. These various novel acts of insight woke the Martian colonists from an age-long dream. They saw that their revered super-individual was scarcely more than the least common measure of themselves, a bundle of atavistic fantasies and cravings, knit into one mind and gifted with a certain practical cunning. A rapid and bewildering spiritual renaissance now came over the whole Martian colony. The central doctrine of it was that what was valuable in the Martian species was not radiation but mentality. These two utterly different things had been confused, and even identified, since the dawn of Martian civilization. At last they were clearly distinguished. A fumbling but sincere study of mind now began; and distinction was even made between the humbler and loftier mental activities.
There is no telling whither this renaissance might have led, had it run its course. Possibly in time the Martians might have recognized worth even in minds other than Martian minds. But such a leap was at first far beyond them. Though they now understood that human animals were conscious and intelligent, they regarded them with no sympathy, rather indeed, with increased hostility. They still rendered allegiance to the Martian race, or brotherhood, just because it was in a sense one flesh, and, indeed, one mind. For they were concerned not to abolish but to recreate the public mind of the colony, and even that of Mars itself.
But the colonial public mind still largely dominated them in their more somnolent periods, and actually sent some of those who, in their private phases, were revolutionaries across to Mars for help against the revolutionary movement. The home planet was quite untouched by the new
