Humanity’s Succession of Species

This flow traces humanity’s repeated extinction, recovery, and redesign across Earth, Venus, and Neptune, culminating in the Last Men.

increasingBearing stren­gth in each eventdecreasing

The First Fall

The First Human Eclipse Civilizational loss Disease, famine, and the loss of technical knowledge reduce the First human species to scattered communities. Ruins survive as reminders of a civilization whose methods can no longer be recovered. Slow recovery A new society rises in Patagonia, but species-wide senescence limits its vitality. Humanity survives, yet its next cultural flowering remains vulnerable to old weaknesses.

A Second Beginning

The Second Men New capacities A biologically renewed people develops exceptional perception, sympathy, and intellectual aptitude. They can more naturally pursue both dispassionate knowledge and love of others. An exposed achievement Their cooperative nature supports long periods of peace, but also makes private ambition a weak motor for change. Their civilization is repeatedly interrupted by disease and conflict.

Remaking the Species

Humanity Takes Its Design in Hand Life as a craft The Third Men make biological manipulation their central art, perfecting plants and animals and debating the costs of shaping life. Their technical mastery gradually turns toward humanity itself. Engineered successors A secret project creates the Fourth Men, whose enlarged brains offer unprecedented intellectual power but exclude ordinary human needs. Their success begins another struggle over what a person should be.

The Fifth Men’s Maturity

A Broader Human Form Reconciliation of capacities The Fifth Men combine long life, rich perception, individual freedom, and telepathic communication. Their advanced society directs much of its effort toward art, science, and philosophy. New limits Their growing engagement with the past brings grief as well as knowledge. Later, the Moon’s changing orbit forces a choice between preserving Earth and securing a future elsewhere.

The Last Human Species

Toward the Last Men A long preparation After humanity moves to Neptune, repeated species rise from primitive conditions. The Fifteenth and Sixteenth Men advance the deliberate redesign of human nature. A final synthesis The Seventeenth Men create a new type, and the Eighteenth Men inherit an exceptionally developed social and spiritual life. Their achievement is real but cannot outlast the approaching stellar disaster.

After the First World State collapses

About ten million years after the Patagonian Catastrophe

During the Third Men’s mature civilization

After the Fifth Men rebuild civilization

The Neptunian Age