The way that most Americans live, work and commute has simply never been the same since Sierks’ pleasant little saltboxes started filling Long Island’s potato fields after World War II.  Truly powerful symbols of the better life we promised returning veterans who grew up during the Depression, and it is no less fascinating to visit Levittown today and see how these houses have evolved into more-individual structures after six-plus decades of renovations, new owners, and demands for more amenities.