Going back to the initial post of this thread(because I sorta glazed over everything else), I look at our society and, oddly, look at two things. The Fermi Paradox and the Singularity.
As reference to the former, not about aliens themselves(though I can wish I'll be alive when/if that day ever comes), but to the aspect of the Paradox called the Great Filter. Earth has already been through a series of these filters, according to Fermi and those who agree with the theory, but the reason it applies to the general Paradox in general is: why haven't we met anyone out there yet?
The idea is that these filters, enigmatic as they are, represent changes to a planet's overall state and society, whether by nature, cosmic events, the race's own actions, take your pick. In terms of humans, I tend ascribe to the latter of these. Some planets with life just don't make it past a filter, which is, in part explains why we haven't met anyone not from Earth. But this filter also ascribes to ourselves.
Basically, and while I wouldn't consider myself a pessimist, it may come off as such. I have strong reservations that we as a species will make it through the next barrier, the actions of the past couple of years is, to me, indicative to that. I don't doubt that nature will likely play a hand in it, but the biggest culprit I suspect is ourselves as whole. Not any singular person, just as a species.
Most futurists predict the next Filter will occur in the next fifty to two hundred years, give or take. And most consider the the Singularity will be apart of that. I don't know how much anyone else reads up on it, but there's been some slightly unsettling hints that we are getting closer and closer to artificial intelligence, and anyone in this particular field with any sense is saying that this is a really bad idea.
This isn't any kind of proclamation that 'the sky is falling', but looking at the slow degradation and regression of our culture as whole, and not to say it's anything new if you look back at the past three decades, but it doesn't give me exactly a lot of hope that we'll all magically find ourselves in a more cultured and evolved state.
Then again, I'm the same person that's always said that the only thing that's going to bring everyone together is either A. Being invaded by extraterrestrial threat or B. Simply knowing they exist. So... y'know, take with the biggest grain of salt you can find.