...plus, "Boss of Bosses" was the title of a rather mediocre book on Paul Castellano written by two ex-FBI agents who were on his case. They conferred that title on him because the Gambinos were the biggest family at the time, and because they wanted to sell their book. The reality was that Castellano could hardly have been the "boss of bosses" because he not only didn't have the respect of his fellow Dons, much less the respect of his own people. That's why Gotti got away with whacking him.