Walter Russel Mead has a fascinating pair of postings on his American Interest blog. They are Beyond Blue Part One: The Crisis of the American Dream, and Beyond Blue Part Two: Recasting The Dream. They are well worth reading and pondering.
Mead argues that the current liberal social model is simply obsolete - the world has simply changed too much for it to be realistic any more (he explains exactly why this is the case in part one). Part two then begins to explore what a new liberal social model might look like if it were tailored to today's world. It is a fascination pair of articles.