He was the father of method acting,he had an acting school he taught All.
Hyman Roth (Lee Strausberg) was one of Al Pacino's teachers back in an acting school where Pacino studied when he was first starting, learning to become a great actor. This classic scene is actually, formally, a teacher and his student .
They say that Ruth is taken after the Great Mafia Boss Meyer Lansky who was Smarter and tougher the most of the Italian Bosses. I think that Moe Greene -His friend who was killed by Michaels people- Is taken after Meyer Lansky's great friend Bugsy Siegel- Who was a tough kid-They grew up together Bugsy was a killer and the one who had the Vision of Building Las Vegas.