"In the middle '50s, I had written that the point would come, inevitably, at which the relationship between the cause of conflict and political objectives would be lost."

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The current generation of world leaders -- our generation -- is also being called to face significant challenges concerning peace, collective security and the environment. We have been unable to solve old disputes and to prevent new threats. The use of force is incapable of eliminating the underlying causes of conflict.

— Dilma Rousseff