We all like to think we are an island--but, I'd definitely have to say "no."
No matter what you do, it has the domino thingey going and affects oh so many that were never a thought in your mind when you're moving right along a breakneck speed doing whatever it is you feel you MUST do.
I've been having a bit of a midlife-empty nest weekend. All those thoughts filled with "should've" and "could've." But it is what it is and I have read (and tend to agree) that you may never be able to enjoy the present if you live in the past.
What is it about human nature that makes us analyze the past in hopes we'll uncover some new tidbit of information that will suddenly enable us to make sense of it all?