Rio is set to host a high-stakes BRICS summit, marked by two historic absences: Xi Jinping and Vladimir Putin. The Chinese president is withdrawing for the first time since 2013, while his Russian counterpart remains in the Kremlin, targeted by an arrest warrant from the ICC. At a time when the bloc wants to assert itself against the dollar and strengthen its influence, these withdrawals weaken the group's unity and raise doubts about its geopolitical trajectory.