It starts with Brady, winning so early in his career allowed the team a chance to focus on building a solid organization and they done that almost to perfection. They've never put themselves in a position for a major rebuild, they've done what teams dream of doing, release players a year too soon instead of a year too late. They game plan brilliantly, they rarely make mistakes. They are in a position, mainly because of Brady's ability, to bench a player if he fumbles or drops a pass.... it won't hurt the team because of Brady. It's really fascinating to watch. They seem to have a specific plan for their roster which they've stuck with that allows them to plug new players in without disrupting the schemes. Great coaching and QB to start with, great team management after. It's frustrating for us but they're a remarkable dynasty. Dynasty's aren't supposed to happen in the free agent era.