Even if you don’t like economics or webcomics, check it out just for the sheer amount of work that went into it. Wow!!!
Link to XKCD page where it was published: http://www.xkcd.com/980/
Link to just the graphic: http://xkcd.com/980/huge/
Small picture of the graphic:
Hats off to XKCD writer & creator Randall Munroe. WOW that’s a lot of work!!!
A downloadable file with a list of his references can be found at http://www.xkcd.com/980/sources/