Reasons could include once-in-a-lifetime elite athletes, a brilliant coach, or an exceptional front office.
That's what Wall Street Journal editor Sam Walker expected when he embarked on a research project to determine the commonalities of the world's greatest professional sports teams throughout history.
• This effect may be just as applicable in the military or the office.
Think of your favorite professional sports teams: What made them great?
She joined the Birchfield Harriers athletics club at 13.