Manhattan Italian emigration. Lucky Luciano established Cosa Nostra in Manhattan, forming alliances with other criminal enterprises, including the Jewish mob, led by Meyer Lansky, the leading Jewish gangster of that period. From 1920–1933, Prohibition helped create a thriving black market in liquor, upon which the Mafia was quick to capitalize. As in the whole of New York City, Manhattan experienced a sharp increase in crime during the 1960s and 1970s. Since 1990, crime in Manhattan has plummeted in all categories tracked by the CompStat profile. A borough that saw 503 murders in 1990 has seen a drop of nearly 88% to
Meyer Lansky role in the consolidation of the criminal underworld. The full extent of this role has been the subject of some debate, as Lansky himself denied many of the accusations against him. Despite nearly fifty years as a member-participant in organized crime, Lansky was never found guilty of anything more serious than illegal gambling. He has a legacy of being one of the most financially successful gangsters in American history. Before he fled Cuba, he was said to be worth an estimated $20 million (equivalent to $ million in ). However, when he died in 1983, his family was shocked to