Question Regarding a Symbol

[Kassad]

It recently dawned on me that I don't know the origin of this symbol:

http://www.revleft.com/vb/customgroupicons/socialgroupicon_131_1239225943.gif

Anyone want to give me a brief history lesson?

[bcbm]

i think its left commie and then i saw it in some crimethinc shit

[Kassad]

Yeah, it seems to be used as a symbol by left communists, but I guess I just didn't really know the historical origin of it. Thanks. :)

[Veovis]

Cover of the Communist International Magazine, issue 9 published 1920.http://en.wikipedia.org/wiki/File:Communist-International-1920.jpg