The Greatest Decade in Film

Upon reading another blog about which decade was the greatest in film, I feel compelled to make an argument of my own. For this argument, I will not be factoring the impact that these films had on future films. Merely, I will be making a case for why the decade came out with the best films in terms of quality. I will be making a post for each decade starting with the 1930's and ending with the 2000's. Note that this is merely my opinion and it doesn't actually mean that the decade I choose it is the "best". Also, I have not seen all of these films. I am merely basing my arguments on what has been said about these films. Therefore, critical acclaim factors into this more than my person opinion, at least until the final decision is made.