This article considers the diplomatic strategies of African states within an evolving United Nations Conference on Trade and Development (UNCTAD). It proposes that the prominence of certain ideas about economic development rises and falls not so much as a result of the nature of the ideas themselves, but as a result of opportunities made and unmade by the world economy. The world economy in turn changes the work mandates of international economic organisations like UNCTAD. The trajectory of African diplomatic strategies is important because it calls into question recent literature in international relations theory focusing almost exclusively on the experiences of industrialised states. In the case of African ideas in UNCTAD, underlying variables associated with the world economy destroyed the remnants of the Group of 77 coalition which had served as an agent for African representatives in UNCTAD. African diplomats have tried to realise whatever objectives they can in the changed circumstances without necessarily changing their ideas about development.