to the courts of other kingdoms tended to reside for extended periods of time, and Arthashastra contains advice on the deportment of the envoy, including the trenchant suggestion that "he should sleep alone". The highest morality for the king is that his kingdom should prosper. New analysis of Arthashastra brings out that hidden inside the 6,000 aphorisms of prose (sutras) are pioneering political and philosophic concepts. It covers the internal and external spheres of statecraft, politics and administration. The normative element is the political unification of the geopolitical and cultural subcontinent of India. This work comprehensively studies state governance; it urges non-injury to living creatures, or malice, as well as compassion, forbearance, truthfulness, and uprightness. It presents a rajmandala (grouping of states), a model that places the home state surrounded by twelve competing entities which can either be potential adversaries or latent allies, depending on how relations with them are managed. This is the essence of realpolitik. It also offers four upaya (policy approaches): conciliation, gifts, rupture or dissent, and force. It counsels that war is the last resort, as its outcome is always uncertain. This is the first expression of the raison d’etat doctrine, as also of humanitarian law; that conquered people must be treated fairly, and assimilated. Europe Byzantine Empire The key challenge to the Byzantine Empire was to maintain a set of relations between itself and its sundry neighbors, including the Georgians, Iberians, the Germanic peoples, the Bulgars, the Slavs, the Armenians, the Huns, the Avars, the Franks, the Lombards, and the Arabs, that embodied and so maintained its imperial status. All these neighbors lacked a key resource that Byzantium had taken over from Rome, namely a formalized legal structure. When they set about forging formal political institutions, they were dependent on the empire. Whereas classical writers are fond of making a sharp distinction between peace and war, for the Byzantines diplomacy was a form of war by other means. With a regular army of 120,000-140,000 men after the losses of the 7th century, the empire's security depended on activist diplomacy. Byzantium's "Bureau of Barbarians" was the first foreign intelligence agency, gathering information on the empire's rivals from every imaginable source. While on the surface a protocol office—its main duty was to ensure foreign envoys were properly cared for and received sufficient state funds for their maintenance, and it kept all the official translators—it clearly had a