The excerpt explains humanity’s psychological reaction after learning that the universe operates as a dark forest, where civilizations hide because contact can lead to annihilation. The image of a child extinguishing a campfire frames humanity’s shift from hopeful outreach to fear of being noticed.

In the immediate aftermath, people support extreme restrictions on electromagnetic emissions. Mobile phone use is temporarily banned, antennas are forcibly shut down, and later restored networks operate under severe limits, with violators treated as threats to all humanity.

The text then clarifies that these measures are largely symbolic and irrational. Earth’s strongest leakage into space had already occurred during the analog era, while modern digital communications and cables had greatly reduced stray emissions; ordinary radio signals could not travel far enough to matter on an interstellar scale.

The excerpt distinguishes ordinary electromagnetic leakage from rare, powerful transmissions such as Ye Wenjie’s use of the sun as an antenna. It also notes that advancing technology later gives humanity more efficient cosmic communication methods, especially neutrinos and gravitational waves, with gravitational waves becoming central to deterrence against Trisolaris.

The chapter closes by emphasizing the civilizational consequence of the dark forest theory: humanity abandons optimism about the cosmos and becomes isolated, paranoid, and afraid of any signal that might reveal Earth’s presence.