I bit the bullet and read Three-Body Problem this weekend.
Pretty good book generally. It's a little techno-babbley in places, but it ties up its plot points well by the end.
The Cultural Revolution kicked everything off. In China, you can criticize the Cultural Revolution, but not Mao. The Chinese are so good at weaponized alienation/ostracism that Ye Wenjie decides to sell out the human race to the Trisolarians. Human contact makes her a little bit better but the damage is already done. Funnily enough, the Trisolarian monitor tries to do the same thing, but gets caught.
Wang Miao is not a protagonist so much as he is a person the plot of the story just kind of happens around, or rather, he's the window the author built to allow us to see the plot happen.
The ETO was hilarious as it was identifiable to the real world. Most of them are drawn from economic and social 'elites' who, in the secret tribunal of their own hearts, proclaimed a death sentence on the human race. It just so happened that the Trisolarians exist and are willing to be the guillotine because our planet is better than theirs. They are more technologically advanced, but humans are more culturally advanced. Between Mike Evans' tirade about Pan-species communism, and unlawful possession of Silent Spring being Ye Wenjie's second 'crime' against the PRC, the book has a pretty low opinion of environmentalists and the well-to-do activist class who want to break the world or play revolution just to alleviate their own boredom.