Question:  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?

Context paragraphs:
Brown Journal of World Affairs: The Brown Journal of World Affairs is an American magazine of foreign policy and international relations, published biannually at Brown University.  It was founded in 1993 as the Brown Journal of Foreign Affairs by Daniel Cruise, Alex Scribner, and Michael Soussan.  The magazine features essays written by world leaders, policy makers, and prominent academics.  Each issue is composed of three thematic sections dedicated to exploring different topics in contemporary international politics and economics.  In addition, each issue includes an open essay section, in which a wide variety of global issues are discussed.

Zompist.com: Zompist.com, also called The Metaverse, is a website created by Mark Rosenfelder a.k.a. Zompist, a conlanger.  It features essays on comics, politics, language, and science, as well as a detailed description of Rosenfelder's constructed world, "Almea".  The website is also the home of the Language Construction Kit, Rosenfelder's article introducing new conlangers to the hobby.

Weghat Nazar: Weghat Nazar (Arabic: وجهات نظر) is an Arabic monthly magazine that features essays and book reviews on politics, culture, literature, and current affairs.  The publication, whose name in Arabic means ‘points of views,’ was inspired by its editors’ vision that the only answer to difference in opinions is dialogue, and that dialogue is an exchange of ‘points of views.’

European Magazine: The European Magazine was a monthly magazine published in London.  Eighty-nine semi-annual volumes were published from 1782 until 1826.  It was launched as the "European Magazine, and London Review" in January 1782, promising to offer "the Literature, History, Politics, Arts, Manners, and Amusements of the Age."  It was in direct competition with "The Gentleman's Magazine", and in 1826 was absorbed into the "Monthly Magazine".

Spin Alternative Record Guide: Spin Alternative Record Guide is a music reference book compiled by the American music magazine "Spin" and published in 1995 by Vintage Books.  It was edited by rock critic Eric Weisbard and Craig Marks, who was the magazine's editor-in-chief at the time.  The book features essays and reviews from a number of prominent critics on albums, artists, and genres considered relevant to the alternative music movement.  Contributors who were consulted for the book include Ann Powers, Rob Sheffield, Simon Reynolds, Michael Azerrad, and Robert Christgau.

Harper's Magazine: Harper's Magazine (also called Harper's) is a monthly magazine of literature, politics, culture, finance, and the arts.  Launched in June 1850, it is the second-oldest continuously published monthly magazine in the U.S. ("Scientific American" is the oldest,but did not become monthly until 1921).  The current editor is James Marcus, who replaced Christopher Cox in March 2016.  "Harper's Magazine" has won twenty National Magazine Awards.

DNA (magazine): DNA is an Australian monthly magazine targeted at the gay male audience.  The magazine features stories, celebrity profiles, pop culture reviews, fashion tips/reviews, grooming tips and photography.  The magazine is available at most newsagencies in Australia, as well as larger book stores.  Launched in Australia in 2000, the magazine is now available in many countries, including Canada, the United States, New Zealand, United Kingdom and several other countries in Europe.

Journal of Economic Literature: The Journal of Economic Literature is a peer-reviewed academic journal, published by the American Economic Association, that surveys the academic literature in economics.  It was established in 1963 as the "Journal of Economic Abstracts", and is currently one of the highest ranked journals in economics.  As a review journal, it mainly features essays and reviews of recent economic theories (as opposed to the latest research).  The editor-in-chief is Steven Durlauf.

Quadrant (magazine): Quadrant is an Australian literary and cultural journal.  "Quadrant" reviews literature, as well as featuring essays on ideas and topics such as politics, history, universities, and the arts.  It also publishes poetry and short stories.

John O'Sullivan (columnist): John O'Sullivan, CBE (born 25 April 1942) is a British conservative political commentator and journalist.  During the 1980s, he was a senior policywriter and speechwriter in 10 Downing Street for Margaret Thatcher when she was British prime minister and remained close to her up to her death.  O'Sullivan served from 2008–2012 as vice-president and executive editor of Radio Free Europe/Radio Liberty.  He is currently president of the Danube Institute and editor of the Australian monthly magazine "Quadrant".  He is also a member of the board of advisors for the Global Panel Foundation, a respected NGO that works behind the scenes in crisis areas around the world.

Supporting paragraphs: John O'Sullivan (columnist) Quadrant (magazine)
Answer: Quadrant