That's kind of a running theme in most of my stories. Humans are uniquely terrible when measured against spacefaring species of higher intellect. We're the only species that would ever even consider genocide. Other species of intelligent life lack a word for it in their lexicon =P

As a realist, I'm sure other species of intelligent life have rough histories of deceit, war, and genocide. But as an optimist, I believe that for them to have evolved to become a tier III civilization (on the Kardashev scale), they would have had to have long moved past all of their differences, and work together as a planet.

But then the realist side of me takes over again. Evolution has mathematical principles that constrain intelligent life. All intelligent species (that we know of) work together. The better they work together, the higher intelligence they accrue. Crows, dolphins, chimpanzees, etc. are all great communicators and brilliant animals.

Sociality appears to be a construct that is unavoidable for intelligent life. Sociality is an evolutionary trait that arises because of a need. Hunting, agriculture, tool making, specialization, and things like that. So it's probable, to me anyways, that all intelligent spacefaring life had a similar start to us humans, albeit under different unknowable circumstances. It's incredibly doubtful that aliens didn't work together or communicate to get to where they got.

There are too many X factors however to conclude something like that. We humans are still similar to our great ancestors in ways we don't innately understand. We know we're afraid of a dark as children, but we don't know that it's an evolutionary trait passed down from those who came before us. Predators used to lurk in the dark; rival tribes of humans struck by surprise under cover of night. We still have the same impulses from when we were sitting around a fire wondering how it got there.

Aliens, however, may not have genes at all, at least not as we know them. It's a possibility they haven't sexually reproduced in thousands of years, and instead jumpstart their young genetically so that they're born with a grasp of concepts and skills that we spend our formative years learning manually through books and guidance. In that circumstance, they wouldn't need to be social anymore. They could branch out all over the cosmos just downloading all the important stuff into the new generation before they even burst out of the chest they've been incubating in.

Holy smokes did I just rant. Should I just delete all of this? ... Nah, y'all can know I'm crazy xD