(Multiple worlds + Not brainless + Civilization group portrait + Soft science fiction)
I say again, these civilizations died on their own. He wasn't killed by me! And I'm always thinking of ways to save them!
What? Don't you believe it? What else do you mean, I'm going to die one by one?
Damn it, you wait. I will go to your civilization tomorrow. There is no need for such a civilization that ignores facts to exist!
This book is also known as: "Record of Unusual Civilizations", "The Day I Made Trouble in Other Civilizations", "I am Not the Destroyer of Civilizations"