 He co-authored several notable books for the Ford Foundation and the Dag Hammarskjöld Foundation on the reform of the United Nations with his colleague and equally devoted United Nations civil servant, Sir Brian Urquhart.The best known of these publications is "A World in Need of Leadership".He continued writing on United Nations matters whilst travelling constantly; lecturing on the Organisation and the many challenges confronting it, such as globalisation and democracy, conflict prevention and peace-keeping, humanitarian assistance, human rights, famine, ageing and development, health, financial arrangement of the United Nations, citizen's rights, female participation, design and perceptions, education, the North South divide and world economy.