Ignatius Frederick "Ian" Clarke was a British scholar and professor of English, known for his work on science fiction as a bibliographer, historian and editor, and also, with his wife Margaret, as a translator of early French science fiction.
This book is about expectations and speculation about the future. I.e., sort of a history of predictions for the future: scientific, social, etc. Including sci-fi and non-fiction predicttions, etc. I found it quite fascinating when I read it, in the late 1980s.