Earlier quoted context omitted.
The second is my favorite by far as well, but I find it funny how it's described as amazing Sci-Fi when I have to describe the plot. Half the book is spoilers The result of granting a nerd all the resources of the Earth at his disposal. He promptly uses it to find the perfect waifu and seduces her in his idyllic European villa. That's not Sci-Fi; That's a power fantasy as old as time.
May reflect on how different people read things differently. I agree that a lot of pages are spent on what you've just described, but to me it was a weird and minor plot point, and I never mention it because I don't see how it's worth mentioning. The game-theoretic aspects of the book, on the other hand, and the final comeback of aforementioned nerd, are something I like to point out when summarizing this book.
And then of course everybody does operate under those principles and feel compelled to act irrationally as a result.
Because resources are limited the only solution is to blow up almost all of the resources to make sure nobody else gets them. The idea that there might be natural limits (even basic thermodynamic ones) to growth apparently never occurs to the author. It's kind of shocking how casual some unnamed alien species is about literally destroying the universe.