Earth’s Abandonment for Venus
Last and First MenThis flow follows the Fifth Men’s discovery of the lunar danger, their transformation of Venus, and the devastating cost of settlement.
increasing
Bearing strength in each event
decreasing
The Moon’s Reversal

An Unexplained Orbit
A broken prediction
The Moon begins approaching Earth instead of continuing its expected retreat. For a civilization confident in its scientific system, the anomaly produces profound intellectual uncertainty.
A planetary deadline
Calculations suggest that lunar breakup will eventually make Earth uninhabitable. Humanity must decide whether to abandon its home or risk extinction there.
Choosing Venus

The Unwelcome Refuge
A narrow choice
Mars lacks water and atmosphere, while Venus has a dense atmosphere and oceans but is too hot and oxygen-poor for human life. The Fifth Men conclude that Venus is the only plausible destination.
A reluctant decision
The prospect of leaving Earth causes grief and resistance. Nevertheless, the species redirects research toward interplanetary travel and the preparation of another world.
Changing the Atmosphere

A Planetary Engineering Project
Electrolysis and plants
The Fifth Men split water to release oxygen and remove hydrogen, while designing vegetation suited to Venus. Automatic stations begin altering the atmosphere and preparing the islands for settlement.
A limited refuge
Venus’s small land area and violent climate constrain the project. The settlers also plan to reduce the human population to fit the world’s limited capacity.
Native Resistance

An Inhabited Destination
Discovery below the sea
The survey reveals intelligent Venerians living in a civilization powered by radioactive matter. Their attacks on equipment show that they understand the human project as a threat.
Moral impasse
The Fifth Men recognize that the ocean is already a home to other minds. Their need to escape Earth, combined with the failure of negotiations, makes coexistence increasingly unlikely.
The Departure

Leaving the Homeworld
Evacuation completed
After years of preparation, humanity transfers its surviving population and cultural treasures to Venus. The relocation takes centuries and remains a reluctant response to approaching catastrophe.
A costly inheritance
The migration preserves humanity but leaves behind Earth and the ethical consequences of transforming Venus. The new home offers survival, not a return to the conditions of the old world.
Late in the Fifth Men’s civilization
After the lunar approach is confirmed
During the Venus preparations
After the Venusian ocean survey
As the Moon nears its critical zone