Postwar, the private sector showed signs of renewed interest in high-density housing. The resurgence of the city’s service sector, as embodied in gleaming office towers of midtown, indicated a real estate vitality not seen in the city since the 1920s. Modernist apartment projects pointed the way to stylish, in-town living that would have been familiar to Fred French, had he lived to see their development.

Located between 65th and 66th streets between Second and Third avenues, Manhattan House (1947-51) occupied a full block in an area that was undergoing significant change as the elevated train tracks that had imprisoned that swath of the city were either recently demolished or scheduled for demolition. An old trolley barn, tenements, and assorted commercial buildings were so affordably priced that New York Life bought extra property in the surrounding blocks.

The clean, crisp modernist design by architect Gordon Bunshaft, principal at Skidmore, Owings & Merrill (SOM), which was associated with the firm Mayer & Whittlesey on the project, was an immediate success and attracted famous tenants such as Benny Goodman, Grace Kelly, and furniture designer Florence Knoll, as well as Bunshaft himself.

The apartments were spacious, but the overall density was an impressive 478 pp/acre. Thanks to New York Life’s interest in long-term profits, the building was more “tower in a garden” than “tower in the park” and covered a higher percentage of land (59 percent) than the vast publicly subsidized projects that were its contemporaries.

Manhattan House inspired its share of glazed brick imitators, but the truth about private investment in postwar New York was grim. With unrelenting middle-class flight, the demand for high-quality, higher-priced apartments in Manhattan remained comparatively weak. Density reduction, given these facts, made more sense to both private and public developers.

Had density levels of Manhattan House been pursued across large areas of the city during the postwar years, it is likely that the city would already be accustomed to much greater density as is the case in crowded cities like Hong Kong. Instead, market failure in postwar New York was used to justify an aggressive strategy of subsidized low-density living.