In response to BubbaInHawaii's comment:
In response to zbellino's comment:
Not that I think there is one way to skin a cat, because we've seen all kinds of teams win in the NFL with all kinds of approaches, but here is one website that covers this topic in depth.
ZB, excellent post.
"Passing is indeed far more important than running, and although offense appears more important than defense, they're equally important."
Not trying to take anything out of context, but...
Passing efficiently. Not passing more. The "more or less" argument is useless. The amount (within reason) you do either or the other is insignificant. Every analysis indicates that efficiency wins ... a.k.a., execution.
What the writer is saying, in context there, is that passing efficiency matters much more than running efficiency, and as he says elsewhere, amount of balance doesn't mean much.
At the end of the day, almost every game plan, up until there is a decisive lead one way or the other, is about the same. It's the execution up front that decides what options you have down the road. This works on the micro (efficiency on 1st down) and macro (efficiency in the 1st quarter) levels.
How well you play decides how much you can run. And it should because the cheif attributes of running the football are shortening the end of a game (not getting your defense rest, so let's not even bring that up ... the "real world clock" keeps running after an incomplete pass even if the game clock stops), protecting the football (in most scenarios, the best QB/Os can be just as protective as a running back per play), and fooling the defense into thinking you want to run it again. Last is it's ability to score or gain yardage, because the best RB has a worse YPC than the worse QB's YPA.