About Joel T. Rosenthal Joel T. Rosenthal received a B.A. and a Ph.D. from the University of Chicago. Since 1964 he has taught history and social science at the State University of New York at Stony Brook, where he is now Associate Professor of History. Books by Joel T. Rosenthal The Purchase of Paradise The Social Function of Aristocratic Benevolence, 1307-1485 by (author) Joel T. Rosenthal