 John O'Sullivan is currently the editor of what Australian monthly magazine that reviews literature as well as features essays on ideas such as politics, history, universities and the arts?
John O'Sullivan (columnist):  He is currently president of the Danube Institute and editor of the Australian monthly magazine "Quadrant". Quadrant (magazine):  "Quadrant" reviews literature, as well as featuring essays on ideas and topics such as politics, history, universities, and the arts.
Quadrant