Mafia refers to secretive groups involved in organized crimes spread over a lot of countries. They are usually referred to by the name of the country they originated in and the majority of members will be of this nationality. They usually aspire to have a monopoly over illegal activities like drugs, firearm trafficking, etc. This is an article about the mafia groups and their activities. They are listed in an increasing order of their influence in the world. 10. Jamaican-British Yardies Jamaican-British Yardies were the Jamaicans who immigrated to Britain in 1950s. They were involved in gang violence and got to be known as Yardies. They conduct organized crimes like drug trade and other gun crimes. They havenâ€™t tried infiltrating the law enforcement system so they arenâ€™t considered to be as strong as other mafia groups. All the crimes involve the use of firearms the use of which is strictly controlled in Britain. 9. The Albanian Mafia The Albanian Mafia consists of a large number of criminal organizations which are based in Albania. They are active in US and European countries as well. It is said that the Albanian mafia spread to international levels in the 1980s. Organized crime prevailed in Albania right from the 15th century. In United States and United Kingdom, they run sex and drug trafficking rackets and are known for quick use of violence for vengeance. 8. The Serbian mafia The Serbian mafia operates in more than ten nations including Germany, United States, United Kingdom, France, etc. They are involved in diverse activities like drug trafficking, smuggling, contract killing, protection rackets, gambling and gen thefts. It has three major groups called Vozdovac, Surcin and Zemun which control the smaller groups. Presently there are about 30-40 groups working in Serbia. 7. Israeli Mafia Israeli Mafia works in a lot of countries in activities like narcotics, drug trafficking and prostitution. Times have changed as the Israeli mafia was once looked at with awe and known for its patronage but today they are ruthless and donâ€™t think twice about killing by standers. The Russian-Israeli Mafia has permeated the US political system so well that the US forces are failing to make any significant progress in stopping them. 6. Mexican Mafia Mexican Mafia is a very strong prison gang in the United States. It was started in the late 1950s to protect prisoners against other inmates and from the officers. This gang has also been involved in extortion and drug trafficking. It has about 30,000 members all over the United States. The gang members sometimes sport a tattoo with a common design which is a Mexican national symbol over a flaming circle and crossed knives. It is said that there are 150 prison members who have the authority to command murder and 2000 associates who will execute these commands. They force gangs and dealers to pay a protection tax and the ones who refuse will be killed.