Who matters now?

It's a rivalry reminiscent of Cain and Abel. The Ambani brothers split up their father's Reliance Group, once one of India's largest companies, and are now competing to see whose vision for the future of Indian business will prevail.

Mukesh is revolutionizing India's agricultural sector by instituting Wal-Mart like efficiency to bring food from field to market faster, while Anil is building the world's biggest power plant and managing the world's fastest-growing mobile network.

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Tell us who you think matters now -- and why