上智大学での2014年来日時の講演をもとにした『我々はどのような生き物なのか：ソフィア・レクチャーズ』（岩波書店）と論旨が重なるが別稿で、より詳しい内容が論じられている。New in paperback. Hardcover was published in 2015. In clear, precise, and non-technical language, Chomsky elaborates on fifty years of scientific development in the study of language, sketching how his own work has implications for the origins of language, the close relations that language bears to thought, and its eventual biological basis. Moving from language and mind to society and politics, he concludes with a searching exploration and philosophical defense of a position he describes as "libertarian socialism".