The Supreme Court's 2005 decision in Kelo v. City of New London stands as one of the worst in recent years, handing local governments carte blanche to seize private property in the name of economic development. Now, four years after that decision gave Susette Kelo's land to private developers for a project including a hotel and offices intended to enhance Pfizer Inc.'s nearby corporate facility, the pharmaceutical giant has announced it will close its research and development headquarters in New London, Connecticut.

The...