On this day in 1940, American music icon Woody Guthrie wrote his most famous song and one that has become embedded into the DNA of American life, "This Land is You Land." The Folk music legend and notorious fighter for the social causes of the poor and working class is said to have written the song after hearing (a few too many times) Irving Berlin's "God Bless America," which he felt was too hyperbolic. Just like Roxanne Shante's "The Real Roxanne" was written as a response to U.T.F.O.'s "Roxanne Roxanne" (OK, maybe not JUST like), "This Land" was Guthrie's "answer song." Guthrie recorded the future standard five years later, but it wasn't until the ’60s Folk revival that the song really took flight, as everyone from Bob Dylan to The Kingston Trio covered the tune. Though "God Bless America" may be the song still sung at baseball games, "This Land is You Land" has endured as one of the greatest pieces of American art, a reflection of what many of us believe our country is all about — "We're all in this together and lucky to be on this wonderful little chunk of dirt, so shut up and quit being so selfish, jerk-ass!" Or something along those lines (maybe I read too much into it). The song is still common at protests and used in political contexts. Bruce Springsteen closed his acoustic concerts in support of Barrack Obama in 2008 with a version ("Yes We Can" chants added), while Rage Against the Machine guitarist Tom Morello serenaded the mass of humanity at the Occupy Wall Street protest in NYC with the song (lost verses and all) this past October. Here is one of the great "contemporary" versions — a rendition by Sharon Jones and the Dap-Kings, who give the song a sweet vintage Soul makeover:Click the jump for "Born This Day" featuring Aziz Ansari, the Mark Twain of Kanye West jokes.