This was Stephen Hawking. He died in March at age 76, having survived 55 years with motor neurone disease after initially, at age 21, being told he had only two years to live. “Survived” is not an adequate word. He rode his wheelchair in the mainstream of the contemporary world, inspiring millions with his stubborn courage. He published opinions that influenced and sometimes angered people around the globe. He repeatedly warned of disaster for the human race unless we control artificial intelligence and colonize space. At the time of his death he was still collaborating on ground-breaking scientific work having to do with how the universe began, whether we live in one of an infinite number of universes, whether black holes irrevocably devour precious information.
During his last year, Hawking was also reexploring his personal archive — his lectures, memoirs, academic and nonacademic writing. He was choosing what to revise and incorporate into a book called “Brief Answers to the Big Questions.”
Hawking died before he could complete the book, but he came near enough for his scientific colleagues, friends and family to decide they could and should finish it for him. Hawking had for some time been asking others to write some of his lectures and articles, much as presidents employ speechwriters, using his ideas, his previously written material and his style, always subject to his vetting and approval.
“Brief Answers to the Big Questions” came out seven months after his death and has put to rest concerns that it would be just a mishmash of recycled material. To answer 10 “big questions,” his colleagues and friends have fleshed out what Hawking had succeeded in writing and the choices he had made from his archive. They have added transitional passages and adjusted wording and syntax to keep the style and tone consistent. Paragraphs that originally targeted an audience of academic scientists have been translated into the language of the rest of us, and some of Hawking’s science ends up being easier to understand here than in his earlier works. The book begins with essays by Eddie Redmayne, who played Hawking in the film “The Theory of Everything”; by Kip Thorne, Hawking’s scientific colleague and one of his closest friends; and by Hawking himself. It ends with a moving afterword by his daughter, Lucy.
“Brief” had become a Hawking trademark since his 1988 bestseller, “A Brief History of Time,” but these “brief answers” are not really all that brief. There are no shocks here, no pulling the rug out from under his previous assertions, as he so often had done. The chapters include the science in which Hawking was engaged as early as his first years as a graduate student at Cambridge in the 1960s, and as late as the weeks before his death, as well as the human rights and future-of-humanity issues about which he was passionate. Hawking was often accused of being out of his depth with matters outside of cosmology, and his co-authors have done a remarkable job of backing up his pronouncements with further information, as he must have hoped to do himself. They wisely chose to include verbatim many of his favorite, most-repeated comments. Chapter 10 ends with the words he used repeatedly in his lectures to young audiences: “Remember to look up at the stars and not down at your feet. Try to make sense of what you see and wonder about what makes the universe exist. Be curious. And however difficult life may seem, there is always something you can do and succeed at. It matters that you don’t give up. Unleash your imagination. Shape the future.” Those were words he himself lived by for many years.
Most of the chapters, but particularly Chapter 6, “Is Time Travel Possible?” and Chapter 10, “How Do We Shape the Future?,” are vintage Hawking — with the straightforward, engaging style of “A Brief History of Time” and “The Universe in a Nutshell.” Chapter 1, “Is There a God?,” lays out the reasoning behind Hawking’s unbelief in more detail than he has done before. What is not addressed here is the bigger question he asked at the end of “A Brief History of Time” — not how the universe might exist without a creator, but “Why does the universe go to all the bother of existing?” He later commented that if he knew that, “then I would know everything important.”
Chapter 3, “Is There Other Intelligent Life in the Universe?” is arguably the most interesting of all. Part of the answer involves tracing the story of life on our own planet from the earliest context in which it may have arisen, through genetic evolution, to “a new phase of evolution” in which information is not transmitted genetically but handed down through speech and writing, and finally to the current possibility that human beings may redesign themselves genetically.
The chapters are written in the first person, as though entirely penned by Hawking. No, he did not write this book alone in his final months, painstakingly, word by word using the twitches of his cheek and his computer program. But the words are mostly his, and the ideas and spirit of the book are definitely his, full of self-deprecating wit and the fun he had taking readers and audiences with him on the scientific adventures he loved. Hawking’s colleagues, friends and family, laboring out of deep respect for him, doing their best to achieve what he intended, have produced a splendid book. Enjoy it, learn from it, and regret that it is Hawking’s last.
to the Big Questions
By Stephen Hawking
230 pp. $25