Why was Marciano's era not strong?

Television had an impact. Before the war young men could learn their craft and pick up some pay fighting in small clubs. With television people were less inclined to go see local boxing, they stayed in and watched boxing on the box. The whole economy of boxing changed.
Also, in America the G.I. Bill and a boom in prosperity might have had an impact.
It probably wasn't just heavyweights, but heavyweights is usually where depth falls away first. Big guys who can box well are actually fairly rare.

 

Marciano, Charles, Moore, Walcott, Bivins, Layne, Ray, Valdez, Maxim, Lastarza ... Maybe a couple more that I'm missing. Maybe they are not viewed as strong due to the fact that in terms of size, they are dwarfed by the era that came afterwards and like you've already mentioned, a slew of big fighters that had previously appeared in the ring. Matchup this to the list you've provided and minus Louis, I don't see that much difference in the quality of fighters I've selected

 

In some 1950s magazines there is some articles about kids getting rushed and burnt out on TV. Two good heavyweight examples are Alex Miteff and Tommy Hurricane Jackson.

I think with frozen titles of the war years a lot of careers were "preserved" and nobody could really touch the circuit of crafty veterans that somehow remained active whilst avoiding the draft.

During the war, with no title to fight for a lot of talented older guys went on the road rematching each other over and over and they did not appear to have worn themselves down doing it.

Once things opened up after the war with actual titles to aim for the older seasoned guys had an edge over the new kids being rushed on TV.

 

Marciano was drafted into the Army in March 1943.He was first stationed in Wales UK,then later he was ferrying supplies across the English channel to Normandy France.Marciano did not get back to the US
,[ Fort Lewis Washington,] until after Germany surrendered. Seems some of us do know a little bit about Marciano after all.

 

Rocky was drafted. He was stationed in Wales. Charles too.
Moore, Walcott, Bivins, Elmer Ray, Valdes, Henry, Satterfeild, Turky and Baker did not appear to have been drafted.

 

The Rock was drafted into the Army in March 1943. He was stationed in Wales, and helped ferry supplies across the English
Channel to Normandy. He got out in 1946.

 

http://bellybuzz.squarespace.com/celebrity-veterans/2012/3/11/rocky-marciano-us-army-1943-1946.html

 

I agree

 

The small fight club venues closed down due to television taking away the audience.
If there's no local place for young upstarts to get fights they end up doing something else.

You seem to be the only one who didn't know Marciano was drafted. He famously had a fight in a pub in Wales, so the legend goes, and was encouraged to take up boxing.

Lots of men came out of the services (not just American, the rest of the world was involved) and became boxers.
Yes, WW2 interrupted some careers and ruined some, and ended lives of course. But the armed forces often introduces men to boxing too.

 

The fighters who developed a real seasoning in the clubs (before TV fights started to ruin youngsters) had the edge over the New kids.

There was a demand to rush the next generation once the war was over. An example in the UK was Bruce Woodcock. Totally over scrutinized from the beginning and rushed, pushed and matched far too hard.