Unexpected consequences can result from human interference or manipulation of any sufficiently complicated natural system.

It is true that unexpected consequences can result from human interference or manipulation of any sufficiently complicated natural system. Often people do things and interfere in nature's work without really giving it a thought about what their meddling can cause to nature. And often the consequences are quite dire - human actions can change the shape of nature drastically, which is why sometimes, people should just leave nature be and not meddle in its work.