[scj]

> I'm sure there's alien civilisations that are more aggressive than us, but also ones that are less so.

What is the minimum amount of aggression necessary to evolve sentience? What is the maximum amount of aggression in an interstellar space-faring species? Where is humanity on that scale?

A super-aggressive species would likely self-annihilate before possessing sufficient energy to travel interstellar distances... So the jury's still out on us.