The boxing landscape has changed. Nobody knows what would have happened if they were around today. Most guys today don't fight in their natural weight class. They squeeze down as low as possible and then rehydrate by a lot of weight. If same day weigh-ins were enforced, most guys would have to move up. I can remember guys like Bob Foster saying that he never got as high as 180 pounds, even with 6 weeks away from the gym. Rocky would probably fight at LHW-CW today, but I wouldn't say it was a given that Stevenson and Kovalev would have beaten him. It's also ignorant to say that Louis would be knocked out by anyone who was skilled who could punch. Joe himself was skilled and he was a terrific finisher.
PEDs, modern training methods (and much wider range of equipment on which to work specific parts of the body), modern nutrition, modern medicine, sports science, bio-mechanics, even ease of travel to broaden experience, ease of access to video via the internet to observe differing techniques, sports psychologists, the cruiser-weight division siphoning off talent which in other eras would have been HW. The list is endless, and this list renders the question at hand utterly pointless...
I'm glad people have sh*tted on you, because it's pure and utter ignorance at the highest level. Seriously, how can anyone think on this level? Sports science and nutrition etc gives today's fighters an advantage. But then again, fighters from yesteryear were brought up in a tougher environment with legendary trainers, and they fought more frequently and were in better shape than the majority of today's guys. They were either always in the gym or fighting. They didn't have only 3-4 fights a year where they ballooned up in weight. They also fought in 15 rounders. Many guys today would struggle in 15 round fights. Are you seriously saying that the top 10 HW's of today would have crushed Mike and Ali? Ha! Okay.
Right, sport science has only progressed in the PED department. Everything else (training, diet, recuperation, injury treatment, massage, sparring, altitude training) is exactly the same as in the 1930s.
Boxing simply doesn't progress in the same way as other sports do. There's fighters from 40-50 years ago that could have beaten some of today's top guys.
It's just ridiculous to compare boxing with any other sport. There's plenty of fighters from yesteryear who were more skilled than the fighters of today.
In theory, what you've written above, should mean that the modern fighter is superior to his peers of yesteryear. But in reality, it's not that straightforward. Many of today's guys aren't as in shape as fighters from the past. Many of them couldn't fight 15 rounds. Many of them don't learn their craft in the same way, fighting a variety of styles and being developed in the same way. It's okay having access to old footage and techniques, but have they being studied and been put into practice? For example, in-fighting and double hooks aren't as common. The legendary trainers who had years of knowledge are sadly no longer with us. Although today's guys are blessed to have sports science and nutritionists to hand, I think we live in a lazy society. I think many fighters from yesteryear were tougher, both mentally and physically.
Cute that is the only proof of the Marciano vs Lowry fight. Unless you can time travel and go back and tape the fight that is all we have. The people at ring side all thought Marciano lost and not only lost was on the verge of getting knocked out various times by a 177 pound mediocre fighter with a career 70 and 68 record. Nobody is comparing Stevenson to heavyweights either. Nobody here thinks Adonis could beat Lewis, Tyson, or people of that nature like people think Marciano could do. Also why are you still on Adonis? He was just one of the many light heavyweights I picked to knock out Marciano not. You are stuck on one fighter. The point is Marciano was a 180 pound fighter who fought 180 pound fighters. He wasn't a modern heavyweight. He was a slow plodding light heavyweight/cruiserweight. Any half way decent heavyweight would destroy him. There are weight classes for reasons. Various fighters from that era like Sugar Ray Robinson would still be great today. Because some fighters back then had skills but that has nothing to do with people putting small guys like Marciano in fantasy match ups with true heavyweights because he is their hero.
Yeah I hear you but, what I mean is, there are so many variables, comparisons are all but meaningless...