14 years ago
For one, nature isn`t an entity, it`s a concept, so nature doesn`t go around creating stuff. Matter was created from energy, energy and matter combined into a more efficient type of matter, and so from less efficient to more efficient bla bla evolution bla bla, actually, the creation of matter was an accident bla bla bla. Trees spread way slower than humans and are cut down by humans way faster than they spread, so that could mean nature made a mistake when it came with it`s magic wand and made humans, eh?
Also, the Xenomorphs` life style is indeed more deffensive than it is offensive, because they don`t go allover a planet to look for hoasts, they just take those that are in the area of the hive and when the hive is secure, they hibernate until other hoasts come around. The drones live to protect the queen, so as long as the queen is kept under control, the drones won`t stray to far off and eradicate life on the planet. Well that is inless a drone gets lost and can`t make contact with the queen anymore and starts a new hive and so on...