Question:  Anarchist Manifesto was written ten years after the publication of a book whose author declared what?
Sentence (from "The World in Six Songs"): The World in Six Songs: How the Musical Brain Created Human Nature is a popular science book written by the McGill University neuroscientist Daniel J. Levitin, and first published by Dutton Penguin in the U.S. and Canada in 2008, and updated and released in paperback by Plume in 2009, and translated into six languages.
Relevant evidence: No