In the 50s, gangsterism was portrayed with organized crime organizations taking over (the Mob), accompanied by tense action, realistic settings, and rich characterizations.
In Fritz Lang's classic crime film noir The Big Heat (1953), Glenn Ford played a vengeful homicide detective in pursuit of a big crime operation and its crime lord to clean up the corruption with the aid of a gangster's moll (Gloria Grahame).
A gritty, grim view of New York's waterfront racketeering and corrupt union bosses was portrayed in the violently raw, documentary-style film titled On the Waterfront (1954), starring Marlon Brando as ex-fighter Terry Malloy and Rod Steiger as Malloy's brother and the union boss' crooked lawyer.
In an effective, classic film noir American crime film titled The Big Combo (1955), a gangster's ex-girlfriend helped half-crazed cop Cornel Wilde break a syndicated crime organization led by Richard Conte.
The caper film was a subgenre of the crime film that developed in the 1950s - John Huston's The Asphalt Jungle (1950) was a superb film-noirish example of the 'heist' picture, depicting a gang of assorted criminals conducting a carefully-planned caper - a jewel robbery.
In Stanley Kubrick's dark, sharp-edged The Killing (1956), Sterling Hayden led a group of criminals in a precisely-timed rip off of a racetrack. In both cases, things went awry with disastrous results.
Eventually, two of the most successful gangland 'Mafia' films ever made appeared in the 1970s with Francis Ford Coppola's direction of Mario Puzo's best-selling novel, The Godfather (1972), and The Godfather, Part II (1974).
Both were epic sagas of a violent, tightly-knit crime family superstructure from Sicily that had settled in New York and had become as powerful as government and big business.
The stunning Part II sequel was the first sequel ever to win the Academy Award for Best Picture. Rarely before, in New York Confidential (1954), had the 'Mafia' been featured in a main-stream film.
Two other mob pictures of the 1990s were part of Martin Scorsese's crime trilogy.
The first film was Mean Streets (1973) about the lives of aspiring, small-time crooks in the Little Italy section of New York.
The other two films - both with the same scriptwriter Nicholas Pileggi - were GoodFellas (1990), which followed thirty years in the lethally-violent criminal careers of rising mobsters and was based on the life of actual ex-mobster Henry Hill, and Casino (1995), which examined a Mafia criminal dynasty that made its presence known in a brutal takeover of 1960s-70s Las Vegas.
Other 1970s films showed the untiring, violent counter tactics of detectives fighting crime including The French Connection (1971), with two narcotics detectives faced an international narcotics smuggling ring.
The first of Clint Eastwood's series as law-and-order maverick Detective "Dirty" Harry Callahan was Dirty Harry (1971), directed by Don Siegel.
The popular, but controversial film spawned four sequels with its star sometimes directing/producing: Magnum Force (1973), The Enforcer (1976), Sudden Impact (1983), and The Dead Pool (1988).
In addition to his brilliant roles in The Godfather pictures, actor Al Pacino also starred in other crime classics, including Serpico (1973), Dog Day Afternoon (1975) - a film with an award-winning screenplay, Brian DePalma's bloody remake of Scarface (1983), and Carlito's Way (1993).
Director Martin Scorsese also explored the theme of family ties being torn apart by unpredictable violence, in a world of losers, loners, outsiders and low-lifes.
His intense films, regularly starring actor Robert De Niro, include his third feature which established his reputation, Mean Streets (1973), followed by Taxi Driver (1976), Raging Bull (1980), GoodFellas (1990), and Cape Fear (1991).
In the early 90s, young screenwriter Quentin Tarantino made his debut film as writer and director. He turned toward directing his own scripts set in the unusual, volatile world of the criminal element.
His own directorial debut for a feature film, after having others direct his scripts for True Romance (1993) and Natural Born Killers (1994), was for the ultra-violent crime thriller Reservoir Dogs (1992) in which six thieving strangers were assembled to conduct a diamont heist that unraveled rapidly in the aftermath. Afterwards, he perfected his mix of humor and ultra-violence in the popular, critically-acclaimed film Pulp Fiction (1994), a complex interweaving of three crime stories.