Event Description
When the full truth of the Trisolaran Crisis was revealed to all humanity, Earth's society plunged into a prolonged dark period known as the Great Trough. People learned that an invincible alien fleet was heading toward Earth, while humanity's fundamental science had been locked down by Sophons, making any breakthrough technological progress impossible. Despair spread like a plague — the global economic system gradually collapsed, and social order rapidly deteriorated.
During the Great Trough, suicide rates soared, birth rates plummeted, and the population declined sharply over decades. Many people abandoned their careers and life goals, believing that all effort was meaningless in the face of certain doom. Government capacity to govern plummeted, and many regions descended into anarchy. Human civilization seemed on the verge of collapsing on its own before the Trisolaran fleet even arrived.
Yet it was in this deepest despair that humanity rediscovered its drive to move forward. A motto was born during this period and spread widely — "Give to civilization the years, rather than give to the years a civilization." Its meaning: rather than obsessing over how long civilization can endure, fill whatever time remains with the brilliance of civilization. Humanity chose to live with dignity rather than wait in fear for death.
Historical Impact
After the Great Trough ended, human society rebounded into an unprecedented period of development. Although fundamental science remained locked, applied technology made tremendous advances. The construction of the Space Force, achievement of controlled nuclear fusion, and building of space elevators all occurred during the post-Trough renaissance. Humanity proved through action that even facing certain destruction, civilization could still shine brightly.
However, the lessons of the Great Trough also carried a dangerous side effect — excessive optimism. As human technology made great strides, people gradually forgot the terrible power of the Trisolaran civilization and began to blindly believe humanity was capable of fighting back. This arrogance would ultimately exact a devastating price in the Doomsday Battle.
Thematic Significance
The Great Trough represents the Three-Body trilogy's most profound exploration of "civilizational resilience." It demonstrates that civilization's greatest enemy is not external threat but internal despair. When all of humanity believes fate is sealed, civilization truly can collapse on its own — but when people choose to seek meaning amid despair, civilization can instead radiate even greater vitality.