You're misunderstanding my point (and Manfred is outright ignoring it now).
Any sort of intelligent civilization out there would have at some point reached the top of their food chain. You know what though, forget the food chain, that's not important. The point is that dominant species, such as humans, tend to be predators. What sort of traits do species that reach the top of the food chain usually have? Well, we have plenty of examples here on this planet for us to study..
I reject your concept of a dominant species, since it rests on entirely arbitrary (and necessarily man-made) criteria. It is based on outdated ideas like linear progress that I don't buy into anymore. Just one small nitpick that might make you understand that your idea of food chain / predator is entirely based on our perception of the world:
What if there was an advanced civilization that never had competitors for their ressources to start with? Like earth, but there are only humans, plants and bacteria.
Or, even better, what if there is a lifeform that doesn't need any ressources to live, because it in itself is entirely self-sustained, it needs not to breathe nor to eat.
What if said species is also hermaphroditical and has the ability to procreate with itself? Suddenly even sexual selection as a potential catalyst for predatory behaviour is out of the way.
Life is not necessarily diverse, a planet could technically only hold a single "species". Life does not necessarily have to unfold as it did on earth.
But of course the deeper we go down this rabbit hole we realize that our definition of what constitutes "life" is far from perfect, that we only need to think about viruses and wether or not they are "alive" to realize that "life" is literally just a catalogue of 7 criteria that some guy, at some point, came up with and that will change in the next centuries.
The same goes for your concept of "dominant" - Do we "dominate" plants? They have no "will" as we know it.. Do we also "dominate" rocks and rivers and mountains then? Do we "dominate" algea or bacteria or viruses or krill or fruitflies or mites?
Please don't take this the wrong way though, I'm not trying to be upsetting or to entirely reject the premise of your argument, because your argument does work if sentient life arose on a planet similiar (awfully similiar) to earth. I am merely saying that doesn't necessarily have to be the case, infact it is highly unlikely that it is the case because possibilities are endless.
