For four decades, the Dallas Cowboys were synonymous with winning and were the gold standard for how to operate a football franchise. Seemingly unhindered by the rest of the football universe, the names of Tom Landry, Roger Staubach, Troy Aikman and Emmitt Smith were exalted to legendary status along the path to earning a record five Super Bowl championships. They won with flair, grace, and a unique quality of football brain-trust that constructed teams with stamina and staying power. From the unprecedented stretch of twenty consecutive winning seasons under Landry, to Jimmy Johnson's group...