4. Syriana (2005)
In Syriana - a grim and chilling examination of the dependency on Middle-Eastern oil and its effects on a global scale - George Clooney, in an Oscar Winning role, is a agent assigned to keep the peace in the oil rich Arabic countries, or at the very least make sure terrorism doesn't disrupt the flow of oil. From Matt Damon's industry analyst to Jeffrey Wright's Washington Insider the maze-like plot weaves in and out of characters and locations so quickly and abruptly making the story hard to follow but irresistible all the same. Director Stephen Gaghan takes this approach to show how easy it is for corruption and greed to flood the system when no one single person knows the entire situation, and Syriana portrays its players as little more than pawns in a greater game of back-room deals and unaccountability, no one gets away clean in the oil game.