The Giant-Dodger rivalry was considered the best in baseball by 1890 and remains the game's oldest and most storied rivalry today. It's remarkable how often both teams have been good, how rarely they've both been bad, and how tenaciously the underdog has battled in between. Through 12 decades (and in two sets of cities 3,000 miles apart) Giant and Dodger partisans have rooted so passionately against each other that, just as during the Civil War,...