I think it's possible... or at least that civilization as we know it will have completely disappeared.  Global warming is permanently changing our planet, war and terrorism are leading uncontrollable third world contries to develop nuclear weapons, and all of our basic infrastructure...health care, telecommunications, transportation, levies... is breaking down in the US.  Maybe the human race will survive, but I doubt very much if the United States will be considered a superpower any more even just one hundred years from now.  Our children will all be trying to immigrate to India to find low-paying manual labor.