It broke down with the increase in population and the reducing of empty land to exile people to. It broke down with the reducing of class structure (we no longer expect people to "know their place," because we now understand that it goes against the very concept of "all men are created equal.").
That doesn't mean it can't be fixed, but just telling the minorities to fix their problems before we address ours is bullshit. It's like an abusive husband expecting perfection from his wife before he changes a single thing -- and, as the judge, he can always find a fault to pick.
No, we (by that I mean white Americans) are not an abusive husband -- but we do kind of expect our voices to be listened to, and if there's disagreement, we kind of assume that our telling of the story will be taken as the real one, simply because the people who have even more power look like us, and were raised in families like ours.
We weren't raised wrong, just incompletely. Because when we were kids, many more people did, in fact, "know their place." And that place wasn't close to us.
Wendy P.