Ranking things across eras -- teams, players, or anything -- is a fool's errand. How do you compare Tom Brady to Johnny Unitas? George Mikan to Shaquille O'Neal? Soccer's no different. Club rosters are far more cosmopolitan than they used to be, wins are worth three points instead of two, and money disparities have created a far less even playing field at the club level (not that it was ever totally even). How would we possibly go about comparing the 1968 Manchester United team that won the European Cup, to the Chelsea team that did the same in 2020-21?