Stephen Hawking is a good example of why scientists should not be allowed to vote, let alone set government policy:

The human failing I would most like to correct is aggression. It may have had survival advantage in caveman days, to get more food, territory or partner with whom to reproduce, but now it threatens to destroy us all. A major nuclear war would be the end of civilisation, and maybe the end of the human race.

This is idiotic. It isn't human aggression that threatens to destroy us all, it is science and scientists. Hawking demonstrates a complete inability to correctly utilize basic logic.

Scientists created the threat. Rather than work to remove the threat, some of the very people who created it now want to EXPERIMENT WITH THE ENTIRE HUMAN RACE in order to do something that won't remove the current threat and might well create some that are even worse.

Scientists love to posture as if they are the good guys responsible for saving the human race, but they are the party primarily responsible for endangering it in a variety of ways.