Originally Posted by madame

That's and interesting point, it is subjective indeed, yet if we consider the development as constant improvement of achievements in terms of knowledge, based on logic, we may think of colonisation as a rational agreement where x parties see the benefits and a potential for survival in collaboration. The fights and power are based on very basic instincts and if we think of it, even if people do great things for these feelings of superiority and self-esteem, even if they use intelligence to fulfil their purpose, it is still a weakness in the situation if you can't simply convince the other that your solution is better.
Given creatures which are rational to the point of avoiding all emotions, technologically developed and with understanding of universe and its rules, why to attack such a tiny planet with such imperfect habitants?

Is there a hidden diplomacy in the Universe? Maybe they know that we are still not prepared? Who knows, but the greed for power is definitely not an ultimate state of mind.

Btw, there is an interesting theory which states that as everything is actually made from particles => it is computable => we may be a Sims game of our future ourselves.