Michael J. Crowe (born 1936) is Rev. John J. Cavanaugh Professor Emeritus in the Program of Liberal Studies and Graduate Program in History and Philosophy of Science at the University of Notre Dame.[1] He is best known for writing the influential book A History of Vector Analysis.[2] After the Great Vector Debate of the 1890s it was generally assumed that quaternions had been superseded by vector analysis. But in his book, published in 1967, Crowe showed how, contrarily, vector analysis directly stemmed from the quaternions.[3] In 1994 a new edition was published.[4]