re: Steve Hawking sezs PRIMITIVE LIFE ABounds in Universe
On the one hand I agree; life is out there, but is it abundant? It depends on how robust the initial stages of evolution are, and this we don't know. Hawkins is a physicist not a biologist or a chemist so how useful are his opinions on alien life?
As for intelligent life destroying itself once it reaches a certain level of radiotechnology know-how; maybe, but I don't think this is a given. Why not assume they use other, more sophisticated means of communciation? To an advanced intelligence radio may be as primitive as the pigeon post.