I recall someone on television (Neil deGrasse Tyson?) commenting that perhaps there is intelligent life out there, but it doesn't want to contact us because we have nothing to offer. We would point to Stephen Hawking, and all the amazing things his mind has accomplished, as an example of intelligence on earth. Meanwhile, the being from 'out there' might think: "Jeez, that's what our four year old does. We're moving on."
Even if there were thousands of Stephen Hawkings legitimizing intelligence on Earth, the 7+ billion other inhabitants who can't figure out how to decrease their numbers — overpopulation's being the underlying reason for conflict of every nature (eg, war, famine, climate change) — present a strong argument for the Gaia principle which will ultimately govern the fate of the planet, intelligence or no intelligence.
Humans have f**ked up the place since they came out of the tress, trespassed on the plains and contaminated every continent.
So, quite right: Movin' on.
