I don't know if anyone has figured out the art of building a team to win a World Series. The automatic answer is probably "Great Pitching," but then you look at the Tigers this year, or the Braves for most of the past 23 years, or the Astros in 2005, and it's apparent that Great Pitching isn't quite as important as it seems. Or not as foolproof, at least. Nor is Great Hitting, which can be negated by one or two guys being injured or slumping, ala Miguel Cabrera this year, ARod in 2004 most years, etc. I think it just really depends a lot on luck, and hot streaks. And the Braves have had shitty luck.