New Delhi, July 3 -- As military warfare grew menacing and fearsome in June, the 50th anniversary G-7 meeting in mid-June became a non-event. But because it was held in Canada during a Canadian presidency of the G-7, it highlighted the arrival on the world stage of Mark Carney, the new prime minister of the host country, who has a global reputation for foresight and adroit management of economic turbulence.

Carney could mark an important start in recognition by the G-7 leadership of the role they must play in the fight to contain the usage of-and damage from-fossil fuels.

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Paradoxically, the immediate fallout feared from the West Asia war was that it would c...