Necessary Evil: Marvel 1999
Why the Kree Invaded
By hacking the Kree Omni-Wave Intranet, Doctor Doom learned the real reason the aliens are here. It’s not to save humanity from their own violent tendencies, as they have claimed. Nor is it, strictly speaking, to exploit our natural resources for their own gain. It is because the Kree, as a species, have been evolutionarily stagnant for millennia. They believe the human race’s highly volatile DNA will lead them to a breakthrough that will fix this problem. This explains why they’ve been transporting mutants and other superhumans off-planet: to dissect them! Doom believes they will soon move on to ordinary humans, as well.
Visit this link for confirmation that the Kree’s evolutionary stagnation is actually Marvel canon, plus some other interesting facts Doom would probably have told you.