Reading Rosselli bio, "All American Mafioso", again. He and Bugsy definitely worked together. No conflicts that the authors of this book know of. They claim before Rosselli went to prison, LA belonged to him, Bugsy and Dragna, and all decisions were agreed upon by those 3. Not sure I buy that. I'm inclined to believe Bugsy had the most pull being under Lansky, Luciano and Costello, but I'm sure at least on a person to person level this front was kept and thus the peace.

"...the successful annihilation of organized crime's subculture in America would rock the 'legitimate' world's foundation, which would ultimately force fundamental social changes and redistributions of wealth and power in this country. Meyer Lansky's dream was to bond the two worlds together so that one could not survive without the other." - Dan E. Moldea