Ranging from questions about God's existence, to whether aliens are real, and if Time travel was possible, Stephen Hawking provides his honest answers in the published work.
In “Brief Answers to the Big Questions,” Stephen Hawking offered blunt responses on faith, the cosmos, and the risks of the future.
Stephen Hawking’s last book, Brief Answers to the Big Questions, sets out a brisk agenda: answer the questions he heard most often, and answer them plainly. On God, he was unequivocal. On alien life, he leaned toward probability. On artificial intelligence, he saw promise paired with danger.
Across ten questions, Hawking argued for a universe governed by physical law rather than purpose. He pushed back on superstition while defending wonder as a discipline, not a mood. The future, in his view, would be shaped less by destiny than by human choices, competence, and restraint.
A universe without a designer
When Hawking addressed the question “Is there a God?”, he did not hedge. “There is no God. No one directs the universe.” He treated the origin of the universe in the same spirit, pointing to “a hot Big Bang” rather than a guiding hand.
He returned to the point later in sharper, more personal language. “No one created the universe, and no one directs our fate,” he wrote. “This makes me realize that there is probably no heaven or afterlife. I think belief in the afterlife is just wishful thinking.” For Hawking, the absence of a cosmic planner was not an invitation to nihilism. It was a demand for intellectual honesty, and a reminder that meaning, if it exists, is something humans build.
His scientific outlook also colored the way he talked about the strangest objects in space. Asked what is inside a black hole, Hawking did not turn it into mythology or metaphor. “Falling into a black hole is definitely bad news. If it were a stellar-mass black hole, you would be made into spaghetti before reaching the horizon.” The answer is almost playful, but the premise is serious: physics is indifferent, and it does not adjust itself for human comfort.
Prediction, time travel, and the limits of certainty
Hawking’s approach to forecasting was similarly unsentimental. To “Can we predict the future?”, he offered a two-part answer: “No and yes.” He accepted that the laws of nature, in principle, allow prediction, but added that “in practice it is too difficult.” The gap between theory and reality matters as much as the equations, because human lives play out in the messy middle, where data are incomplete and systems are chaotic.
On time travel, he kept the door slightly ajar without pretending it was an open highway. “Travel back in time can’t be ruled out according to our present understanding.” That phrasing is careful: it leaves room for the unknown without selling fantasies. It also reflects a consistent theme in the book, that scientific humility is not the same thing as superstition. Not knowing is a starting point, not a license.
Aliens: likely, and not necessarily friendly
On intelligent life beyond Earth, Hawking again struck a balance between plausibility and prudence. “There are forms of intelligent life out there. We need to be wary of answering back until we have developed a bit further.” The caution was not framed as panic, but as a strategic warning. If other civilizations exist and are older, their capabilities could dwarf humanity’s, and good intentions cannot be assumed.
That idea carries an implicit rebuke to a certain kind of wishful thinking: the hope that an advanced civilization would automatically be wise, gentle, or eager to help. Hawking did not argue that contact would be catastrophic. He argued that it would be reckless to behave as if the stakes were low.
Space, survival, and the long view
Hawking treated human survival as a practical question rather than a slogan. Asked whether humans will survive on Earth, he did not write an obituary for civilization, but he did not offer comfort, either. “The present world order has a future, but it will be a very different one.” The line leaves room for continuity and rupture at once, without specifying what will drive the change.
Space, in his telling, was less a romantic frontier than an extension of long-term survival and curiosity. On whether humanity should colonize space, he offered a confident timeline: “I expect that within the next hundred years, we will be able to travel anywhere in the Solar System.” The claim is ambitious, but it fits his broader conviction that human ingenuity can expand the range of the possible, provided it does not outpace judgment.
Artificial intelligence: power without guarantees
Hawking’s warnings about artificial intelligence were among his most direct. “A super-intelligent AI will be extremely good at accomplishing goals — and if those goals aren’t aligned with ours, we’re in trouble.” The point is not that machines become evil in the way stories imagine. The point is that competence scales faster than wisdom, and that goal-seeking systems can cause harm without malice.
The underlying fear is mundane and therefore hard to dismiss: a powerful tool that is mis-specified, misused, or pushed into deployment before humans understand the consequences. In Hawking’s view, the danger is not only technical. It is political and social, because controlling such systems depends on institutions and incentives that do not always reward caution.
The book closes less like a sermon than a reminder of posture and perspective. Hawking’s final answer to “How do we shape the future?” is simple, and he stated it as advice rather than prophecy: “Remember to look up at the stars and not down at your feet.”
It is a line about attention and ambition, but also about discipline. If the universe is not directed on humanity’s behalf, then the responsibility for the future rests with humans, not with fate. Curiosity, in Hawking’s view, was not decoration. It was survival equipment
Here I bring you Stephen Hawking’s 10 biggest questions — and his final answers
Is there a God?
There is no God. No one directs the universe.
How did it all begin?
In a hot Big Bang.
What is inside a black hole?
Falling into a black hole is definitely bad news. If it were a stellar-mass black hole, you would be made into spaghetti before reaching the horizon.
Can we predict the future?
No and yes. In principle, the laws allow us to predict the future, but in practice it is too difficult.
Is time travel possible?
Travel back in time can’t be ruled out according to our present understanding.
Will we survive on Earth?
The present world order has a future, but it will be a very different one.
Is there other intelligent life in the universe?
There are forms of intelligent life out there. We need to be wary of answering back until we have developed a bit further.
Should we colonize space?
I expect that within the next hundred years, we will be able to travel anywhere in the Solar System.
Will artificial intelligence outsmart us?
A super-intelligent AI will be extremely good at accomplishing goals — and if those goals aren’t aligned with ours, we’re in trouble.
How do we shape the future?
Remember to look up at the stars and not down at your feet.
