Historians insist that it's not dates and events that matter from the past. Instead, people and themes over time are the aspects of history that have an impact on our lives. This doesn't only apply to the causes of the Civil War or the aftermath of the Civil Rights Movement, however. Real human stories fraught with vitriol, and unique events are why we care about NFL controversies and continue to argue for our chosen side long after the rest of the world has moved on. So, what are the top controversies that have rent the NFL asunder over the years? Let's start on a holy note (or unholy if you're a Raiders fan) with the Immaculate Reception.