I guess this isn't a question on which series has the purest form of racing, but perhaps which style exemplifies the purest form of racing. I have noticed that in older NASCAR races, you would see longer periods of green flag and sometimes the leader winning by laps. Now a days, you see every finish with 20 cars on the lead lap. Which is a purer form of racing (in all motorsport, NASCAR was just an example)? Do we constitute 'good racing' as door to door, fender to fender, for entertainment purposes or is there something deeper that fans want to connect with and draws people to go watch an event.