Interstate relations during the Spring and Autumn period
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Certain patterns emerged to govern the conduct of relations among the states of the Spring and Autumn period of ancient China. These patterns constituted a rudimentary system of interstate or international law[1] based on the model of feudalism established under the Western Zhou dynasty. The norms of interstate relations during the Spring and Autumn period was one of the earliest systems of interstate relations and international law in the world. It was of importance in the early cultural and political development of China, allowing greater ease in maintaining relations, and facilitating the flow of trade and information. There was a growing body of customary international law which developed as contacts and commerce increased, a number of treaties were signed, and the appeal was frequently made to rules set up within the leagues of states. A great many of the canons of interstate law concerned diplomacy among the states.
Interstate relations originated in the feudal system of the Western Zhou, whereby leaders of the states were granted hierarchical titles from the King of Zhou, who also held the title of Son of Heaven. Within a few years after the beginning of the Spring and Autumn period, these ranks lost their practical significance.[2] Diplomacy came to be dictated by the security interests of the states rather than by ceremony. Although the Zhou king remained the supreme ritual office through this period, royal representatives were sidelined at interstate conferences.[2]
The institution of hegemon (霸), created to designate the one privileged to command campaigns on behalf of the Zhou king, helped to stabilize the Zhou ecumene in the 7th and 6th centuries BC and unify the states against invading tribes. The interstate conferences convened by the hegemons helped to maintain peace, such as the four decades-long truce between the states after the Shangqiu conference in 546 BC. The hegemon order declined with the rise of the southern peripheral kingdoms of Wu and Yue in 500 BC.[3] Although the Zhou royal institutions had become politically impotent, there was little attempt to alter the political thought underpinning the state system until the late 6th century BC. For much of the Spring and Autumn period, interstate politics were somewhat overshadowed by the internal conflicts within states, among the aristocratic lineages and the state rulers.[2]
Ancient sources such as the Zuo Zhuan and Chunqiu record the various diplomatic activities under such terms as chao (朝), a court visit paid by a lesser ruler to another; hui (會), meetings of officials or nobles of different states; pin (聘), missions of friendly inquiries sent by the ruler of a greater state to another; shi (使), emissaries sent from one state to another; shou (狩), hunting parties attended by representatives of different states.[4][1] Notably, tribute offerings were not limited to the Zhou king but also given to a stronger polity as a symbolic consent to the relationship between two polities at different power levels.[5]
In the early years of the Spring and Autumn period, the rulers of the various states were the most important personages in the conduct of external affairs. They soon came to rely on their xingren (行人) or messengers to carry on most of the preliminary work in any matters of importance. These xingren were usually officials of fairly high rank within the state who carried out these commissions on a temporary basis. There were also the ambassadors, shi (使), who carried out more and more of the ceremonial duties of the ruler outside his state. Up until the first half of the Spring and Autumn period, however, the rulers themselves usually had to be present at the signing of any agreements which committed their states to any action. Reflecting the growing importance of external affairs, xiang (相) or chancellors, began taking a more active role in diplomacy. An indication of the growing power of the xiang was that the chancellors of several states were able to repudiate a covenant which had been signed in 506 BC by the rulers of their various states. The culmination of this trend was reached later in the Warring States period, when the establishment of an external policy had become almost the exclusive concern of the chancellors.
With the exception of the states which from time to time assumed the role of leaders, the states in general dealt with each other on a footing of equality.
The interstate system applied to polities that met a standard of civilization; states that transgressed that standard, as defined by Confucian culture, could be 'excommunicated' from the interstate system by being labelled as 'barbarian' and hence no longer eligible for sovereign equal rights.[1]