Brazil’s former Minister of External Relations, Ambassador Celso Amorim, explores how the nuclear nonproliferation regime fits into the broader dynamic of international relations. How can or should the interests of established nuclear-weapon states be reconciled with the interests and perspectives of emerging major powers such as Brazil? What kind of nuclear order does Brazil want, and what does its uranium enrichment program say about Brazil’s vision? What lessons should be drawn from the Iran-Turkey-Brazil negotiations that produced the May 2010 Tehran Declaration?