Quotes
Stephen Hawking on the Future of Humanity
In his later years Hawking spoke increasingly about humanity's long-term survival: the risks of artificial intelligence, the case for space, and the dangers we pose to ourselves.
Last updated 23 May 2026 · How we research
As he grew older, Hawking turned more and more of his public voice towards the future of the human species. He had spent a career looking at the universe on the largest scales of space and time, and he applied the same long view to humanity's prospects, often with a warning attached.
On artificial intelligence
Hawking became one of the most prominent voices cautioning about advanced artificial intelligence. In a widely reported 2014 interview he warned that the development of full artificial intelligence could spell the end of the human race, arguing that a sufficiently advanced AI might redesign itself and outpace slow biological evolution. He was careful to acknowledge AI's enormous potential benefits too; his concern was that we should think hard about the risks before, not after, building something that could surpass us. Coming from a man who depended on AI-assisted technology to speak, the warning carried particular authority.
On leaving Earth
A second recurring theme was his belief that humanity's long-term survival depends on becoming a multi-planet species. Hawking repeatedly argued that confining ourselves to a single, increasingly crowded and fragile planet was a risk we should not accept, and that spreading out into space was a form of insurance against catastrophe, whether from our own actions or from events beyond our control. He framed space exploration not as a luxury but as a necessity for the species.
On the dangers we pose to ourselves
Hawking did not reserve his concern for distant threats. He spoke plainly about the more immediate dangers of greed, short-sightedness, environmental damage and conflict, warning that our greatest risks were largely of our own making. His pessimism about human behaviour was matched, though, by a real hope that we could choose better if we understood the stakes.
A considered last word
These themes are gathered most fully in his final book, Brief Answers to the Big Questions, published after his death, which devotes whole chapters to AI, space and the survival of humanity. It is the best place to encounter his thinking on the future in his own measured words rather than in the headlines his warnings often generated.
His thinking on these themes is set out more fully in his views on artificial intelligence, the survival of humanity and alien life.