OCCUPY WALL STREET and its allied movements around the country are more than a walk in the park. They are most likely the start of a new era in America. Historians have noted that American politics moves in long swings. We are at the end of the 30-year Reagan era, a period that has culminated in soaring income for the top 1 percent and crushing unemployment or income stagnation for much of the rest. The overarching challenge of the coming years is to restore prosperity and power for the 99 percent.