If there is far superior intelligent life out there watching us then I hope they will intervene before we do something that would send the world into an apocalyptic state.
I think other alien life are about the same or less than us technology wise so that's the reason we can't get a hold of each other because we are galaxies apart.
Due to the vastness of our universe even statistically speaking there is high chance of Intelligent Life on other planets.
But the same statistics apply to us. Given our 'poor' technology in space travel, we have very limited ways of finding other lifeforms only in our neighborhood. Whereas other civilizations with high technology advancements can increase their search radius. However given the same statistics of finding a needle in a haystack, it will take time for us to get contact from another Intelligent Civilization.
Honestly, I believe our government has. I think they made a deal with them and that's why they always try to cover up any sign of them. Atleast that's my theory.
Bowjangols, do you mean the US government? If aliens were ever to meet the government of Australia, I’m certain our representatives would make mistakes the likes of which would make collective humanity groan in embarrassment. Not a good example of representative democracy, although what nations are?
The Aliens movie made a good theory on how planets were populated: alien DNA. It is plausible that we were visited here centuries ago and established as a colony.