From the book by Joseph Conrad, which was also the inspiration for the movie Apocalypse Now.
"Think of a decent young citizen...coming out here.... Land in a swamp, march through the woods, and in some inland post feel the savagery, the utter savagery, had closed in around him--all that mysterious life of the wilderness that stirs...in the hearts of wild men. There's no initiation either into such mysteries. He has to live in the midst of the incomprehensible, which is also detestable.
What saves us is efficiency--the devotion to efficiency. But these chaps were not much account, really. They were no mere colonists; their administration was merely a squeeze, and nothing more, I suspect. They were conquerors, and for that you want only brute force--nothing to boast of, when you have it, since your strength is just an accident arising from the weakness of others."