Ian Bremmer is president of Eurasia Group and GZERO Media and author of "The Power of Crisis: How Three Threats -- and Our Response -- Will Change the World."
Lack of shared political, economic vision will restrict areas of influence
BRICS leaders on Aug. 24: The bloc's new members will give it a meaningfully larger share of global GDP than the G7. © Reuters
Ian Bremmer is president of Eurasia Group and GZERO Media and author of "The Power of Crisis: How Three Threats -- and Our Response -- Will Change the World."