Definition of Tone
The narrator's tone in The Three-Body Problem is somewhat offbeat: they narrate with an irreverence offset by the frequent, earnest use of figurative language. The narrator holds nature and science in high regard and is deeply critical of the ways in which government control and ideology impact scientific inquiry. Interestingly, this produces both an admiring tone and a rather pessimistic tone within the text. Take, for example, the following passage from Chapter 34:
A small black cloud covered the sun and cast a moving shadow against the ground. This was not a common cloud, but a swarm of locusts that had just arrived. As the swarm landed in the fields nearby, the three men stood in the middle of a living shower, feeling the dignity of life on Earth.