There are different ways to use strength in the ring, you can grab, hold, and force your opponent to the ropes like Fullmer, Jack johnson, or John Ruiz (I know it's blasphemy to put Ruiz in their class, but the guy does use his strength to win fights-he also weighs 240-doesn't look it), or you can use your upper body strength like Foreman to shove swarmers off of your chest (where they can do damage) and force them back outside where they have to run the gauntlet to get back inside. Marciano's pressures' different, he doesn't tie up much, instead he uses his legs and lower center of gravity (like I said, it's like trying to push on a fire hydrant) to drive his opponent to the ropes. Because when their opponent's back is on the ropes, not only are they easier to hit, but most of them arn't as dangerous with their back on the ropes, they don't have any leverage or room to throw (unless they are great in-fighters, or they're used to fighting off the ropes, which few fighters are), so Marciano is much safier if his opponents on the ropes and his opponent has to fight him out of a phone book, with no leverage. Thing is, Marciano's opponents either have to push back with their legs (against someone who is lower than them), go to the ropes, or move. Either way they are expending energy. Next point: In a Marciano-Dempsey match up, everyone thinks that Dempsey will nail him with a big right hand ala George Foreman. Dempsey has the same style as Marciano, he wants to get inside. a lot of times when two swarmers meet people predict early KO's, that's not always the case. A lot of times both fighters are "safe in the pocket" and because of that they don't land bombs. I think a big key to that fight would be strength and conditioning (and Marciano has a better uppercut than Dempsey, which will come into play with two swarmers). Now, you have one fighter who's whole fight plan is predicated on using his physical strength, the other uses his hand speed and ability to throw combinations (which was a big deal in the 1920's). As far as Dempsey muscleling Firpo or Willard, I didn't see that. I saw a guy get inside by slipping their roundhouse right hands (neither of the "Giants" -Firpo was 6-3 1/2 had much of a jab) then killing the longer-armed fighters with combinations. Then after dropping them, he got behind them (no neutral corner back them) and sucker punched them back down again and again (not Dempsey's fault that was the rules back them).