When Kansas City Royals left fielder Alex Gordon clobbered a hanging cutter from Toronto Blue Jays right-hander Ryan Tepera over the wall in the eighth inning Tuesday night, Major League Baseball had itself a new single-season record for home runs in a season — surpassing the 5,693 hit in 2000, at the height of the so-called steroids era. Gordon’s historic home run ball is headed to Cooperstown. It’s where the game is headed, in the wake of this milestone, that makes this a moment for reflection.