Obama asks in his acceptance speech:

If there is anyone out there who still doubts that America is a place where all things are possible, who still wonders if the dream of our founders is alive in our time, who still questions the power of our democracy, tonight is your answer.

Here is one of his "answers":

It's the answer that led those who've been told for so long by so many to be cynical and fearful and doubtful about what we can achieve to put their hands on the arc of history and bend it once more toward the hope of a better day.

Bending toward Hope of a Better Day? That's not what he meant by "Bending the Arc of History" in February of 2007. From Obama's own website, in the community pages, Ed Kundson writes:

February 11th in Ames, Iowa. He talks about the arc of history bending toward justice, a phrase used by Martin Luther King

and what kind of justice is that arc bending to?

There is no concern for economic justice, for social justice, for racial justice, no concern even for basic civil rights. This administration is captured by neoconservatives advocating militarism, by market fundamentalists who think business can do no wrong, and by religious fundamentalists who want to destroy the public schools and use the power of the state to force everyone to submit to their particular view of the bible. So, I think that word "justice" is vitally important.

Prepare to be Bent.