Group 1 - The G20 summit in South Africa gathered economies representing three-quarters of the global population, two-thirds of global GDP, and three-quarters of global trade, despite the absence of the United States [3][5] - The summit highlights a shift in the global economic focus, moving from the concentration of capital, production, and power in the last century to a future defined by the diffusion of technology, energy, and influence [3] - The rise of Global South countries and the new roles played by middle powers like Canada in new multilateral mechanisms are shaping this transition [3] Group 2 - The U.S. government officially boycotted the summit, with the U.S. Embassy in South Africa reiterating its stance against participating and opposing any summit outcomes without U.S. consent [5] - South Africa responded to the U.S. boycott by stating that the U.S. has lost its "speaking" rights due to its refusal to participate, indicating a resistance to U.S. pressure [5]