I don't feel that the traditional family is "under attack". Changing? Yes. In more than one way. Not necessarily failing though.
One way, is that a long time ago, it used to be a mother and father and children. Now it's stepparents, stepchildren, stepsiblings, and half-siblings. You still see the occasional "traditional" mother, father, and children, but not as often as you see the other.
Another way, is with changing values in society, family values are changing. Each family has its own set of morals and values, and parents do not all raise their children the same way. They didn't before either, but they at least had a "basic outline" back then of how children should be brought up. Now they're all very different, but to say that any of this puts the family system "under attack" is a little over the top. No parent has the right to judge how another parent raises their child.