(most recently updated 2/12/2023, after Super Bowl LVII  was played)
When I was growing up in the 1970s, one of my favorite collections was a set of miniature plastic National Football League helmets. I recently happened to find them again, and now that nearly 50 years have passed, it is interesting to look back at what has changed in the NFL since then.
During the '70s there were only 28 teams. So that was 14 teams per conference, which did not divide up very well. There were only three divisions in each conference, so two divisions consisted of five teams each, while one division consisted of four teams.