Organization London Library

American Academy of Arts and Sciences (honorary member)

Lloyds Bank (clerk)

The Criterion (founder and editor)

The Egoist (assistant editor)

Poetry magazine (contributor)

Faber and Faber (literary editor)

Society of King Charles the Martyr

Wesleyan University Press

Classical Association (president)

Virgil Society (president)

Books Across the Sea (president)

Accademia dei Lincei (foreign member)

Bayerische Akademie der Schoenen Kuenste (foreign member)

Athenaeum

Garrick Club

Oxford and Cambridge Club

High Wycombe Grammar School, London (teacher)

Highgate School, London (teacher)

Harvard University (Charles Eliot Norton Professor of Poetry)

Harvard University (Theodore Spencer Memorial Lecturer)

Institute for Advanced Study at Princeton (resident)

University of Virginia (Page-Barbour Lecturer)

University of Chicago (lecturer)

Library of Congress (lecturer)

Trinity College, Cambridge (Clark Lecturer)

Temple Bar Magazine (editor)

Daily News

Manchester Guardian

Garrick Club (member | 1943-)

New College of the Humanities (founder)

Birkbeck College, University of London

St Anne's College, Oxford University

Bedford College, University of London

Aristotelian Society

British Humanist Association

United Kingdom Armed Forces Humanist Association (patron)

Dignity in Dying (patron)

World Economic Forum

Prospect Magazine (contributing editor)

June Fourth

UN Human Rights Council for the International Humanist and Ethical Union

Index on Censorship

British Institute of Human Rights

Royal Society of Literature

Society of Authors

English PEN

Bletchley Park

Royal Air Force

Chatham House

Chatto and Windus

Hogarth Press

University of Sussex

Penguin Books

UN Subcommission on the Prevention of Discrimination and the Protection of Minorities

Africa Bureau

Chios Charities

Open University

Institute of Strategic Studies

Amnesty International

Jonathan Cape

Coldstream Guards (WWII)

Rupert Hart-Davis Ltd (1946-1968)

National Portrait Gallery

British Museum

Royal Literary Fund

Roxburghe Club

Jockey Club

Coldstream Guards