answer:Hawking could have gone a bit farther with his concern: The rise of human intelligence will mean extinction for the human race. That is, as our intelligence improves (in any of the various ways one wants to define “intelligence”) our control systems do not improve at the same rate. We continue to crowd out species and spoil environments and ecologies that we need to survive as a species, and we continue to react irrationally towards one another. As someone has said (I paraphrase): “Our weapons systems continue to improve, but our diplomatic skills are stuck in the Dark Ages.”