The more I get into baseball the more I'm realizing that it's a pitchers game. If a pitcher is unhittable, the opposing team cannot win. I've also read some material on early pitchers in the deadball era that suggested hurlers during that time were actually very smart, and that the game was nearly as intricate then as it is now.
I've also realized that there have been major shifts in how the game is played over time, such as the the style of play during and after the dead-ball era. So what I'm curious about is in what ways has pitching made dramatic shifts since the inception of the MLB?