He didn't do what the article claims: "He refused to participate in society and no one has seen him since." What that means in the article is that if someone b

He didn't do what the article claims: "He refused to participate in society and no one has seen him since." What that means in the article is that if someone behaved like John Galt, they would not survive among our ancient ancestors. So a John Galt would have disappeared, that's why the article says that "no one has seen him since."