The Best film from each decade

[Elvis]

Something different. What do you feel is the best film from each respective decade. We will start at the 1930's and work our way thru 2000's. So that is eight films total. Please only one per decade no ties and no runner up's. This can be foreign and domestic. You might use "favorite" as a way to make your list or maybe most influential. How you come up with 8 films is up to you but please only 8.

*Maybe add a little something like how and why your list is the way it is for discussion.