I've fairly recently been watching the best middleweights from the 30s to now and I have definitely not seen a decline in skills as such, simply a difference in circumstances that to some extent give the illusion of decline. The most obvious factor in regards to the middleweight division is that the super and junior middleweight divisions have taken some of the talent away from the middleweight division. If you take around half of the super middleweights and half of the junior middleweights and add them to the middleweight division then the quality of that division increases quite considerably.
In general the supposed decline in boxing is really a relative decline in American boxing. If you look at the nationalities of world champions throughout history you would see a real sea change occuring around the sixties. The American strangehold of the championships starts to loosen somewhat. The supposed golden age of boxing (roughly 1930-1960) was the golden age of American boxing but there has been a great surge in the rest of the world since then.
In general the supposed decline in boxing is really a relative decline in American boxing. If you look at the nationalities of world champions throughout history you would see a real sea change occuring around the sixties. The American strangehold of the championships starts to loosen somewhat. The supposed golden age of boxing (roughly 1930-1960) was the golden age of American boxing but there has been a great surge in the rest of the world since then.
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