Engineers and their strive to evolve like humans
In prometheus its very obvious the engineers didn't evolve as a species, in the beginning where they seeded life which was thousands if not millions of years ago they looked exactly the same when project prometheus was launched. This being said they don't have the ability to evolve. Unlike humans which can evolve, due to our inhabitance on earth. Earth enables us to evolve. As we evolve we become more and more advanced, which pose a threat to the engineers, and could make the engineers extremely jealous of us, all In which the engineers realize. Possibly the engineers can't evolve due to the plant they live on or other circumstances. And since they want to evolve so badly, they wouldn't do almost anything to have the ability to evolve, to become more and more advanced, giving them more power. This could be one of many reasons as to why the engineers want to destroy man kind, So perhaps the engineers want to claim earth and wipe out man kind so they can have the ability to evolve like humans, resulting in the engineers becoming more advanced and "powerful." Any thoughts?





