Embracing an area more than half a million square miles, the kingdom of Mali was undoubtedly one of the richest and most prosperous on earth in the 14th century. Its territory touched the Atlantic Ocean to the west and extended as far as the bend in the Niger River to the east. From north to south, it embraced the entire swath of land south of the Sahara to the thick tropical forests of...

More than a thousand years before modern nations established cloak and dagger intelligence agencies, the art of political assassination was perfected in West Asia. The architect of this art was Hassan al Sabbah, a shadowy character shrouded in exotic mystery about whom as much information has come down to us as misinformation. The Seljuks tilted the internal balance of power within the Islamic...