Robert Dale McHenry (born April 30, 1945)[1] is an American editor, encyclopedist, philanthropist and writer. McHenry worked from 1967 for Encyclopædia Britannica Inc. or associated companies, becoming editor-in-chief of the Encyclopædia Britannica in 1992, a position he held until 1997. McHenry is also author of the book How to Know (2004), and a frequent contributor to journals.