Why Focus So Much on Men?

You write in the book that god has given man the ability to be the best thing or the worst thing that ever happened to a marriage. So my question is, why focus so much on men? Aren't there two people involved in every marriage? Absolutely. And of course, anyone listening to this, some one's, someone's wife could do incredible harm and damage, or bring incredible blessing, but to the marriage. But i think god wants men awake to that, to that responsibility, to that power, to that influence that has been entrusted to them to steward well.