Glass began his career in 1973 with ABC News in Beirut, where he covered the Arab-Israeli war in Syria and Egypt with Peter Jennings. He became the network's chief Middle East correspondent, a position he held for ten years, before deciding to freelance. Since then, he has also worked with CNN and the BBC. In print, he has written for "The New York Review of Books", "The Independent", the "Spectator", "The Christian Science Monitor", "TIME magazine", "The Guardian", "Chicago Daily News", "The Daily Telegraph", "The Sunday Telegraph", "New Statesman", "Times Literary Supplement", "London Review of Books", "Granta", "Harper's Magazine", and "The London Magazine".