Divide and Rule is a 1948 collection of two science fiction novellas by L. Sprague de Camp, first published in hardcover by Fantasy Press, and later reissued in paperback by Lancer Books in 1964. The collected pieces were previously published in 1939 and 1941 in the magazines Unknown and Astounding. The first stand-alone edition of the title story was published as a large-print hardcover by Thorndike Press in September 2003.