The author of this opinion, Marie-Noelle Nwokolo, is a 2024 alumna of the Atlantic Dialogues Emerging Leaders Program.In September 1978, delegations from 138 countries gathered in Buenos Aires, Argentina, around a powerful idea: developing countries had knowledge, experience and capabilities worth sharing with one another. The Buenos Aires Plan of Action gave institutional form to what we now call South-South Cooperation, part of a wider post-colonial effort by developing ...