The ball was changed in 1920. That's generally considered the beginning of the 'live ball' era. The NL OPS in 1920 was .679. In 1921, it was .736 (dispelling the notion that 'the average player was Craig Counsell during Ruth's era), with a lowest league OPS of .724 during the decade. The NL OPS this year? .727. Hmmm............ This all culminated with the NL OPS-ing *808*! during the 1930 season, with the AL OPS-ing a *measly* .772. It's widely accepted that the ball was doctored in 1930 to boost sagging attendance (Hack Wilson's 56 HR 191 RBI campaign, every Cardinals starter hit at least .303!) and in 1931 they went back to the 'regular' ball to get offense back in line, but we never saw a complete drop of offensive production to the dead ball era levels again. A few other points, more antecdotal evidence than anything though. Most players, (as someone else pointed out) didn't go for homeruns, because hitting them with a dead ball in HUGE parks was near impossible. When a HR happened, it was an accident, plain and simple. Making long fly outs was a bad way to play station to station baseball, so that's why most guys didn't try to hit homeruns like Ruth did. Now here again, is heresay, but I read a newspaper article about Ty Cobb once upon a when, where shortly into the 1925 season, a reporter asked him about Babe Ruth, the new fascination with the longball, and how it was changing the game of baseball. Cobb said "hitting homeruns isn't anything special, any fat*** can hit a homerun, it takes real hitting TALENT to hit .400, and I'll prove it" Supposedly, he went on to hit 5 homeruns in the next 2 days, and then only hit 7 more the rest of the year. Baseball Reference's home run log definitely bears this out, as his HR log shows he hit 3 bombs on May 5th, and two more on the 6th. It doesn't prove he was trying to hit them for some show or vendetta, but at least the information is able to be backed up. Again, the stadiums were monstrous, several of them would be the biggest parks in play today, even putting pitchers parks like PETCO and such to shame for the depth. Ruth changed the fundamental way that the game was played. I can see why some people would make an argument that Ruth today wouldn't be as good as Pujols, or Pujols back in the day would have been better than Ruth. Neither can be proven right or wrong, and that's what makes these debates all the more fun.