I liked the opening of "The Gods Must Be Crazy", in particular when they say "But he didn't know when to stop."

Here's the part of the script comparing the simple lives of the native bushmen of the Kalahari desert to "civilized man":

    These Bushmen have never seen a stone or a rock in their lives.
    The hardest things they know are wood and bone.
    They live in a gentle world, where nothing is as hard as rock, steel or concrete.

    Only miles to the south, there's a vast city.
    And here you find civilized man.
    Civilized man refused to adapt himself to his environment.
    Instead he adapted his environment to suit him.
    So he built cities, roads, vehicles, machinery.
    And he put up power lines to run his labour-saving devices.

    But he didn't know when to stop.

    The more he improved his surroundings to make life easier...
    ...the more complicated he made it.
    Now his children are sentenced to years of school, to learn...
    ...how to survive in this complex and hazardous habitat.
    And civilized man, who refused to adapt to his surroundings...
    ...now finds he has to adapt and re-adapt...
    ...every hour of the day to his self-created environment.