As one of Canada’s last chargé d’affaires in Iran, Dennis Horak watched the Islamic republic from the inside during his three-year tenure from 2009 until just before Canada closed its embassy in 2012. Now retired, his service also included Iraq, Egypt, and Saudi Arabia. That experience takes on new relevance after the latest military attacks on the regime by the United States and Israel. Missing from much of the debate over the past few days is a clear-eyed understanding of how Iran sees itself: its history, its insecurities, and the logic that governs its nuclear program and responses...