To shed light on the dynamics that are currently redefining the planet’s geopolitical landscape, this tripartite study undertakes to analyse the operation of the BRICS+ and PIIGS groups of countries, their heterogenous make-up and their importance in international relations, while comparing them to devoted multilateral structures. In this first part, we will look at the origins of BRICS and their evolution to BRICS+, before discussing their goals for 2024. The new dimension of this partnership, in economic, demographic and military terms, will thus be highlighted, in particular thanks to a discussion of the recent measures aiming to strengthen its global influence.