Start of postmodernism in movies

Let's start at the beginning.

 Many people say it was in the 70s, some even believe James Dean and his unconscious, careless attitude was the first sign.

1994 - Quentin Tarantino

   In my mind, Tarantino was the landmark. 1994: the internet culture lived its childhood, still even the most innocent viewer noticed, that the videos became fragmented, nothing made sense as it did before. That's when Pulp Fiction was born. A weird child in the history of cinema, what gained popularity almost overnight and became the Bible of filmmakers ever since.

  The classic gangster movie turned to drama, comedy and social criticism of the average American's life at the same time. The use of flashbacks and -forwards is just brilliant. If you haven't seen it, you have definitely heard of it or experience(d) its influence. From this a whole lot of movies started out including some by Guy Ritchie (Snatch, Rock 'n' Rolla) or Matthew Vaughn (Stardust, Kick-Ass) or even influenced street artists such as Banksy, in the sense of giving a general criticism of the average narrow-minded middle class citizen.