Fiber-Optic Bird's Nest: the Second Civilization

The war destroyed radio, but made optical fiber the nerve of human civilization. No one cares about a few birds stealing fiber optics to build their nests. Until they learn to use maintenance robots, learn to store information, and learn to spread knowledge through optical cables spread around the world. Fifty years later, a network of light covering hundreds of kilometers appeared in the Arctic. A civilized war between human beings and second intelligence is about to begin. When the Earth first had two brains, who was the real master of the world?