For generations, American athletes have enjoyed the ever-escalating celebrity lavished upon them when they combine on-the-field talent with off-the field charisma, but never before have we seen as transformative a sports dynasty as the Mannings: a bloodline of strong arms, Southern values, and savvy business instincts--each man compelling in his own right, made whole by family. But how, in just fifty years, did this private trio achieve football...