I subscribe to the theory that our own bias as humans leads us to believe that human style intelligence is the pinacle of evolution throughout the universe. As one of the great old sci-fi writers said human intelligence has yet to be proven as a long term evolutionary advantage. It may be that less intelligent but more sustainable life is more typical. Look at the dolphins for example. They don't seem to have any interest in building radio transmitters or spaceships yet they are very intelligent. If this theory is true we can learn a major lesson: We have to become more sustainable creatures if we want to win the evolutionary contest over the long term.