Everything depends on whether Tehran, and not just President Hassan Rouhani, is serious. No surprise, many analysts -- and more importantly, paladins of Capitol Hill -- remain skeptical. And that doubt has fueled efforts to impose new sanctions, which would impede if not kill efforts to reach a final accord.
One might allow that rules and norms vary by culture. But we have no need to blaze new trails here. The United Nations' Universal Declaration of Human Rights establishes, based on the consensus of humanity, that dignity is a human right. Cultural relativism has gone a step too far when it steps on dignity.