The Martians

IV: The Catastrophe

Observe the Earth's destruction from afar, noting the sudden brilliance of the planet.

VII: The Rise of the Second Men

Mentioned as a different form of life in the solar system, pursuing ends incomprehensible to man.

II: The Intercourse of Three Species

Not directly present, but the narrative is told from the perspective of a distant future observer, possibly Martian.

VIII: The Martians

The chapter provides a detailed history and psychological profile of the Martians, explaining their collective mind, their obsession with radiation and diamonds, and the delusions that led to their invasion of Earth.

I: The First Martian Invasion

First seen as green cloudlets, they descend and attack a village, killing several inhabitants before being dispersed.

Life on Mars

The chapter focuses on the biology and psychology of the Martians, describing their evolution from subvital units to cloudlet organisms with a group-mind.

III: The Martian Mind

The chapter provides an in-depth analysis of the Martian mind, highlighting their collective consciousness, lack of individuality, and advanced natural science but spiritual backwardness.

Delusions of the Martians

The chapter details the Martians' collective psychology, their history of racial conflict, and the delusions that led to their downfall.

Earth and Mars

The Martians are the antagonists, whose colony undergoes a renaissance but is ultimately destroyed by the home planet.

I: The Second Men at Bay

The alien invaders, driven by economic and religious motives, who repeatedly attack Earth and are ultimately destroyed but leave behind a deadly subvital dust.

II: The Ruin of Two Worlds

The Martian colony and home planet are destroyed by the human virus.

III: The Third Dark Age

Their lethal bacterium nearly wipes out humanity, and their subvital units later become symbiotic with terrestrial animals.

IV: The Culture of the Fifth Men

Mentioned as a contrast to the Fifth Men's telepathic group-mind, which was inferior to individual minds.

Exploration of Time

Mentioned in the context of the Martian invasions, which are the subject of a medium's vision.

IV: Preparing a New World

Referenced as a historical parallel, having invaded Earth in the past, highlighting the ethical dilemma of man's own invasion of Venus.

I: Taking Root Again

Their units, which enabled telepathy, cause a cancer in the human nervous system.

XV: The Last Men

Referenced as being insanely and miserably obsessed, among the tragic beings of the solar system.

III: A Racial Awakening

Mentioned as having a racial mind that failed to transcend individual minds, serving as a cautionary example.

IV: Cosmology

Referenced as one of the suffering intelligent species, 'insanely and miserably obsessed'.