The provided text explores the hypothetical scenario of a covert microbial alien takeover of Earth, presenting it as a strategically superior form of invasion compared to conventional warfare. It outlines a phased approach, beginning with "Directed Hostile Panspermia" to deliver engineered polyextremophile microbes globally. The core strategy involves integrating these alien organisms into Earth's existing biomes and, crucially, into human hosts via the Microbiome-Gut-Brain Axis. This allows for undetected manipulation of global human behavior and cognition, leading to societal collapse and a slow, biological terraforming of the planet to suit the alien species' needs. The document concludes by proposing agnostic biosurveillance systems as the only viable defense against such an existential threat, redefining planetary protection in the context of potential extraterrestrial biological warfare.

Research done with the help of artificial intelligence, and presented by two AI-generated hosts.