From the Introduction: "Congress enacted the federal Racketeer Influenced and Corrupt Organization (RICO) provisions as part of the Organized Crime Control Act of 1970. Despite its name and origin, RICO is not limited to 'mobsters' or members of 'organized crime,' as those terms are popularly understood. Rather, it covers those activities that Congress felt characterized the conduct of organized crime, no matter who actually engages in them. RICO builds on other crimes. It enlarges the civil and criminal consequences of the patterned commission of other state and federal offenses (otherwise known as predicate offenses or racketeering activity), making it a crime to be a criminal, under certain circumstances."
CRS Report for Congress, RS20376
Congressional Research Service: https://crsreports.congress.gov/