Lincoln MacVeagh (October 1, 1890 – January 15, 1972) was a United States diplomat, archaeologist, soldier and publisher, he was the founder of Dial Press.
He served in the Artois, St. Mihiel and Meuse-Argonne campaigns and was cited by General of the Armies John J. Pershing in 1919 for "exceptionally meritorious services."
After World War I, he became a director of Henry Holt and Company, a publishing firm in New York City.
In 1940, at the beginning of World War II, British troops had invaded and occupied Iceland in fear that Germany would take the island first.
President Roosevelt appointed him to another ambassadorship, this time as the Envoy Extraordinary and Minister Plenipotentiary to the Union of South Africa.
In 1947, he gave secret testimony to the Congress on the danger of Soviet-supported extreme leftist movements in the Balkans.
This testimony was considered an important factor in formulating what became known as the Truman Doctrine, which stated that the U.S. would support Greece and Turkey with economic and military aid to prevent their falling into the Soviet Union's sphere of influence.
While he was in Greece, MacVeagh conducted excavations beneath the Acropolis and made archeological contributions to the National Archaeological Museum of Athens.
He retired in 1953 as an envoy in Madrid after having conducted successful negotiations for military and economic agreements between the United States and Spain.