A twentieth-century American science fiction and fantasy writer, he published thousands of short stories, hundreds of radio plays, and over ten screenplays. He won a Hugo Award for Exploration Team, a 1956 science fiction novella.
He served in World War I with both the Committee of Public Information and the United States Army.
His novella, First Contact, was one of the first science fiction works to employ the literary device of a "universal translator."
He married Mary Mandola in 1921; they had four daughters.
His first short story, The Foreigner, was published in H. L. Mencken's literary magazine, The Smart Set.