The Day the Earth Stood Still (1951)

http://www.imdb.com/title/tt0043456

We humans are doomed aren't we?

We are either going to cause our own extinction by lobbing nuclear weapons at one another or we are going to p o some peaceful alien race that visits Earth by shooting first and asking question later causing them to 'death star' planet Earth.

4.5/5

(maybe some day I will break down and watch the Keanu Reeves remake but I doubt I will anytime soon)