Colombian President Gustavo Petro, Brazilian President Luiz Inacio Lula da Silva, Bolivian President Luis Arce and Peruvian President Dina Boluarte.

Reducing deforestation in the Amazon is good policy, but as last week’s summit bringing together leaders of the Amazonian countries demonstrated, it can make for difficult politics. Instead of arriving at regional solutions, the summit exposed divisions in South America on a topic that is high on the global environmental agenda.

BRICS, an organization with China, Russia, India, South Africa, and Brazil, is considering expansion.

The divisive debate within BRICS over whether and how aggressively to expand membership is a sign the group lacks a clear mission and direction. But it also underscores the differences in how BRICS’ members view both the benefits they receive from the grouping and their future role in the international community.