The Fifth Men's Conflict with the Venusian Natives and Extermination Campaign

The Fifth Men's Conflict with the Venusian Natives and Extermination Campaign turns the settlement of Venus into a moral crisis: the Fifth Men discover an intelligent civilization already living there, yet proceed with a migration that will destroy it. Their technological capacity gives them the means to remake the planet, but not a way to do so without imposing a fatal cost on its inhabitants. The resulting extermination is presented not as a simple victory over an enemy, but as a deed that reshapes the Fifth Men's understanding of themselves.

Discovery of a Living Ocean

The conflict emerges from the Fifth Men's preparations to make Venus a new home. The discovery that several electrolysis stations had been wrecked, alongside the mysterious explosions of survey vessels, first suggested unexplained sabotage. The evidence became more concrete when a damaged ship returned from ocean sounding with a spherical metal object attached by a hook to its equipment. As the crew tried to bring the object aboard, it struck the hull and exploded. What had seemed an industrial hazard or natural disturbance was revealed as an act of deliberate resistance.

The investigation overturned a basic assumption behind the colonization project. The Fifth Men had thought that an ocean without dissolved free oxygen could not support life. In fact, Venus's world-spanning ocean contained abundant organisms, from microscopic and stationary forms to creatures as large as whales. Their biology depended on the controlled disintegration of radioactive atoms rather than photosynthesis and ordinary chemical processes. Venus held radioactive elements that had long since disappeared from Earth, and the ocean's living systems drew energy from the gradual destruction of minute quantities of those atoms within their tissues.

Among the many native forms, several were intelligent and capable of using mechanical devices against one another. One species had achieved dominance and built a civilization powered by radioactivity. These beings, the Native Venerians, were roughly swordfish-shaped, with three manipulatory organs concealed within a long forward projection and extendable as branching tentacles. They moved through the water with their bodies and triple tails, and used fins to steer. They reproduced by laying eggs on the ocean floor; their cities, observed by human explorers, consisted of proliferating coral-like structures. The Fifth Men could establish the existence of organized life and technological skill, but they could not understand much of its inhabitants' mental world. Their uncertainty was real, not an absence of evidence that the ocean was inhabited.

Resistance and the Human Dilemma

As the Fifth Men's activity on Venus expanded, the Native Venerians became more determined to stop it. Bound to the deep ocean, they could not confront the settlers on land, but they could attack the human project from below and at a distance. They hurled explosives into island centers and undermined them through tunnels, seriously disrupting electrolysis. Attempts to negotiate failed, leaving no compromise that both sides had accepted.

The attacks made the colonization project a war, but the Fifth Men did not treat the conflict as morally straightforward. Their own history supplied a pointed comparison: the Martians had once invaded humanity, presumably believing themselves superior. Now the Fifth Men faced the possibility that they were committing the same kind of wrong against beings whose intelligence was evident, even if their thoughts remained inaccessible. Their judgment of the Native Venerians as mentally inferior rested on what human observers could assess; the account acknowledges that this measure might be mistaken. If an unfamiliar form of intelligence exceeded human understanding, the Fifth Men's inability to recognize it would not prove its inferiority.

They also reasoned that the Native Venerians faced extinction even without human settlement. Their dependence on radioactive matter placed a limit on their civilization, since those atoms were continually disintegrating and could not be replenished. Submarine research indicated that the native fauna had once been more extensive and that obtaining radioactive material was already a principal constraint. This prospect complicated, but did not erase, the moral question: the Fifth Men believed their settlement would hasten a decline already under way, not that the inhabitants' prior existence gave them no claim to their world.

Terraforming and Extermination

The hope had been to settle Venus without seriously disrupting its native population. That hope failed for two related reasons. First, the resistance escalated into enormous explosions. These damaged the invaders but also left thousands of Native Venerians dead. Second, electrolysis released free oxygen into the atmosphere, as required to make the planet habitable to humans. The ocean absorbed some of this oxygen, and the dissolved element harmed the organisms, whose tissues began to oxidize. The slow poisoning was a consequence of the very process the settlers needed to continue.

The Fifth Men could not stop electrolysis until Venus's atmosphere approached the composition of Earth's. Long before that point, they concluded, the Native Venerians would be exterminated within at most a few thousand years. By then human settlements were already being founded on the islands, and people could walk outside there. The Fifth Men decided that waiting for the poison to kill the native life would prolong its suffering. They built powerful submarines and sent a fleet to scour the ocean and destroy its fauna. This was not simply the continuation of combat against attackers: it was a deliberate campaign to end the lives of the entire native population while securing the planet for human migration.

The decision arose under pressure from Earth's approaching lunar catastrophe. By the Fifth Men's assessment, the Moon would fall, and at no distant date; migration to Venus therefore seemed necessary for humanity's survival. Their choices were consequently narrowed by two destructive processes: abandon the project and risk humanity's extinction, or carry it forward and ruin a biosphere that had not been empty. The campaign followed from that perceived necessity, but the account does not present necessity as innocence. The act of saving humanity remained a killing of intelligent life.

Aftermath and Moral Consequence

The extermination unsettled the Fifth Men's collective state of mind in opposite ways. The slaughter produced a pervasive sense of guilt and disgust at the fact that humanity had been driven to murder in order to survive. That guilt joined two other wounds: the collapse of scientific confidence after science failed to explain the Moon's approach, and an older, irrational guilt born of sympathy with the enduring distress of the past. Together, these pressures tended toward racial neurosis.

Yet the same events could also provoke a contrary response. The failure of science became a challenge that opened possibilities not previously imagined, while the suffering of the past was treated as something that present and future humanity might somehow transfigure. Some among the Fifth Men understood the killing of the Native Venerians as terrible but right, carried out without hatred and, paradoxically, with a form of love. As the submarine campaign proceeded, the crews learned more about the lives they were destroying and came to admire them. Knowledge and attachment did not halt the operation; they made its emotional meaning more difficult to reduce to hatred of an enemy.

The campaign's decisive consequence was therefore not only the removal of the Native Venerians and the clearing of the way for human settlement. It also intensified the Fifth Men's spiritual sensibility, as the narrative describes it, refining their capacity to hear themes in universal music that had previously remained obscure. Their encounter with Venus exposed a contradiction in their survival: they could act with tenderness toward a people they had resolved to destroy, and their admiration could deepen even as their fleet continued its work. The new world was secured through an act the Fifth Men could neither regard as harmless nor simply forget.