Dhaka, May 2 -- This is hardly a golden era of diplomacy. A ceasefire - let alone a lasting peace - between Russia and Ukraine remains a distant possibility, and neither Israel nor Hamas seems to view a long-term truce in Gaza as a priority. The one bright spot on the global diplomatic chessboard may be the relationship between the United States and Iran.

Yes, you read that correctly: the same US that Iran's ruling clerics have called "the Great Satan" since the Islamic Revolution nearly half a century ago. The same US that supported the Shah until his ouster in 1979. The same US that killed Qassem Suleimani, commander of Iran's powerful Quds Force, just five years ago.

Iran, for its part, is the same country that held 52 Americans host...