 He later became an editor at "Fortune", and in his final two decades at the publication before his retirement in 1997, he wrote more than 400 of the magazine's "Keeping Up" columns, even after stepping down as associate managing editor in 1988.In a February 1988 editorial marking Seligman's transition to a contributing editor after 37 years at the magazine, the managing editor of "Fortune", Marshall Loeb, described Seligman as ""an acerbic slayer of (mostly liberal) prig-headedness ... [who] uses elegance and trenchant wit to wage his never-ending battle against fustian thinking.