The Russian mafia is considered one of the most dangerous groups in the world, and is without doubt the largest criminal organization today. Some people estimate their numbers are in excess of 300,000 members, and the list of their illegal acts is out the door. They are involved in countless crimes such as extortion, drug trafficking, auto theft, trafficking in stolen art, money laundering, contract killings, arms dealing, trading nuclear material, prostitution, oil deals and many others.