Is there a simple introduction, a few few pages that will help me at least identify "systems thinking" when I see it? Right now I keep hearing that "systems th

Is there a simple introduction, a few few pages that will help me at least identify "systems thinking" when I see it? Right now I keep hearing that "systems thinking" is a good idea, but I could not tell it apart from regular thinking. I've seen some definitions that are vague and circular: e.g. "systems thinking deals with thinking about systems" but there must be more to it than use of the word "system"