The rise of the Islamic State has dramatically forced a recalculation of political order and security in the Persian Gulf and broader Greater Middle East by the United States and its allies and adversaries, including, most notably, Iran, Israel and Saudi Arabia. Since the Arab Spring of 2011, the Islamic State has altered the military balance in the Syrian intra-state conflict and captured significant territory in Iraq. Its military successes has attracted foreign fighters from more than 100 countries, drawn in some cases by a sophisticated recruitment strategy that effectively combines a...

The rise of the Islamic State has dramatically forced a recalculation of political order and security in the Persian Gulf and broader Greater Middle East by the United States and its allies and adversaries, including, most notably, Iran, Israel and Saudi Arabia. Since the Arab Spring of 2011, the Islamic State has altered the military balance in the Syrian intra-state conflict and captured significant territory in Iraq. Its military successes has attracted foreign fighters from more than 100 countries, drawn in some cases by a sophisticated recruitment strategy that effectively combines a...