Fouro makes a great observation:
You can't change organizations. You can only reveal them to themselves. And they like what they see. Or not.
If they follow the "or not" path, you can offer suggestions as to the alternatives that fit for them, and for what they believe. If they haven't evolved to the point of knowing what they believe, you start there and the rest reveals itself.
It is really that simple. The rest consists of removing spackle and years of self-deception.