Internal political changes also took place as states grew in population and area. The most basic of these was in the pattern of power delegation. Under feudalism, authority had been delegated by the lord to the vassal. The new state rulers sought ways of maintaining and organizing their power.

In the state of Jin the influence of kinsmen of the ruling house had been trimmed even before Wengong established his overlordship. Wengong reorganized the government, installing his most capable followers in the key posts. He set up a hierarchical structure that corresponded to the channels of military command. Appointments to these key positions came to be based on a combination of merit and seniority, thus establishing a type of bureaucracy that was to become traditional in Chinese government.

The Chu government was perhaps the oldest true monarchy among all the Chunqiu states. The authority of the king was absolute. Chu was the only major state in which the ruling house survived the chaotic years of the Zhanguo period.

Local administration went through a slow evolution. The prefecture system developed in both Jin and Chu was one innovation. In Jin there were several dozen prefects across the state, each having limited authority and tenure. The Jin prefect was no more than a functionary, in contrast to the feudal practice. Similar local administrative units grew up in Chu. New lands taken by conquest were organized into prefectures governed by ranking officials who were evidently appointed by the king. The prefecture system of Jin and Chu was to become the principal form of local administration in the Zhanguo period.

By that time, practically all the major states had chancellors, who acted as leaders of the courts, which were composed of numerous officials. Whereas in the feudal state the officials had been military officers, the more functionally differentiated court of the Zhanguo period usually had a separate corps of civil service personnel. Local administration was entrusted to prefects, who served limited terms. Prefects were often required to submit annual reports to the court so that the ruler could judge their performance. Regional supervisors were sometimes dispatched to check the work of the prefects, a system developed by the later Chinese imperial government into the “censor” system. Fiefs of substantial size were given to only a few people, usually close relatives of the ruler. There was little opportunity for anyone to challenge the sovereignty of the state. The majority of government employees were not relatives of the ruler, and some of them might not even have been citizens of the state. Officials were paid in grain or perhaps in a combination of cash and grain. Archives were kept by scribes on wooden blocks and bamboo strips. These features combined indicate the emergence of some form of bureaucracy.

The new pattern was the result of the efforts of many reformers in different states. Both practical men and theoreticians helped to form the emerging structure, which, though still crude, was the forerunner of the large and complex bureaucracy of later Chinese dynasties.

Military technique also underwent great changes in the Zhanguo period. In the feudal era, war had been a profession of the nobles. Lengthy training was needed to learn how to drive and shoot from a chariot drawn by horses. There was also an elaborate code of behavior in combat. The nature of war had already changed by the late Chunqiu period, as the nobility had given way to professional warriors and mercenaries. In some states, special titles of nobility were created for successful warriors, regardless of their origin. Foot soldiers were replacing war chariots as the main force on the battlefield: the expansion of the major states into mountainous areas and the rise of the southern powers in an area of swamps, lakes, and rivers increased the importance of the infantry.

Battles were fought mostly by hordes of foot soldiers, most of them commoners, aided by cavalry units; war chariots apparently served only auxiliary roles, probably as mobile commanding platforms or perhaps as carriers. All of the Zhanguo powers seem to have used conscription systems to recruit able-bodied male citizens. The organization, training, and command of the infantry required experts of a special type, and professional commanders emerged who conducted battles involving several thousand men along lines extending hundreds of miles. A few treatises on the principles of warfare still survive, including Bingfa (The Art of War) by Sunzi. Cavalry warfare developed among the northern states, including Qin, Zhao, and Yan. The Qin cavalrymen were generally drawn from the northern and northwestern border areas, where there were constant contacts with the steppe peoples. The rise of Yan from a rather obscure state to a major power probably owed much to its successful adoption of cavalry tactics, as well as to its northern expansion.

Economic development

Important changes occurred in agriculture. Millet had once been the major cereal crop in the north, but wheat gradually grew in importance. Rice, imported from the south, was extended to the dry soil of the north. The soybean, in a number of varieties, proved to be one of the most important crops. Chinese farmers gradually developed a kind of intensive agriculture. Soil was improved by adding manure and night soil. Planting fields in carefully regulated rows replaced the fallow system. Great importance was placed on plowing and seeding at the proper time (especially in the fine-grained loess soil of northern China). Fields were weeded frequently throughout the growing season. Farmers also knew the value of rotating crops to preserve the fertility of the soil, and soybeans were often part of the rotation. Although iron was used to cast implements in the 5th century bce (probably even as early as the 8th century bce), those early examples discovered by archaeologists are of rather inferior quality.

Irrigation became necessary as population pressure forced cropland to be expanded, and irrigation works were constructed in many states beginning in the late Chunqiu period. These projects were built to drain swampy areas, leach out alkaline soil and replace it with fertile topsoil, and, in the south and in the Sichuan Basin, to carry water into the rice paddies. The irrigation systems unearthed by archaeologists indicate that these were small-scale works carried out for the most part by state or local authorities.

Another significant change in the economic sphere was the growth of trade among regions. Coins excavated in scattered spots show by their great variety that active trade had expanded into all parts of Zhou China. Great commercial centers had arisen, and the new cities brought a demand for luxuries. The literary records as well as the archaeological evidence show that wealthy persons had possessions made of bronze and gold, silver inlays, lacquer, silk, ceramics, and precious stones. The advancement of ferrous metallurgy led to the earliest recorded blast furnace and the earliest steel. The Chinese had been casting bronze for more than a millennium; turning to iron, they became highly skilled at making weapons and tools. The Han historian Sima Qian (writing c. 100 bce) told of individuals making fortunes in the iron industry.

As the old feudal regimes collapsed and were replaced by centralized monarchies during the Zhanguo period, the feudal nobility fell victim to power struggles within the states and to conquest by stronger states. During the Chunqiu period these parallel processes drastically reduced the numbers of the nobility.

A new elite class arose in the late Chunqiu, composed of the former shi class and the descendants of the old nobility. The members of this class were distinguished by being educated, either in the literary tradition or in the military arts. The shi provided the administrators, teachers, and intellectual leaders of the new society. The philosophers Confucius (551–479 bce), Mencius (c. 371–289 bce), Mozi (Mo-tzu; 5th century bce), and Xunzi (Hsün-tzu; c. 300–c. 230 bce) were members of the shi class, as was also a large proportion of high-ranking officials and leaders of prominence. The interstate competition that drove rulers to select the most capable and meritorious individuals to serve in their courts resulted in an unprecedented degree of social mobility.

The populace, most of whom were farmers, also underwent changes in status. In feudal times common farmers and laborers had been subjects of their lords. They owned no property, at most being permitted to till a piece of the lord’s land for their own needs. The ancient texts tell of the “well-field” system, under which eight families were assigned 100 mu (15 acres, or 6 hectares) each of land to live on while collectively cultivating another 100 mu as the lord’s reservation. Individual ownership grew as farming became more intensive, and, increasingly, farmers were taxed according to the amount of land they “owned.” The land tax had become a common practice by Zhanguo times. By paying taxes, the tiller of the field acquired the privilege of using the land as his own possession, which perhaps was the first step toward private ownership. As states expanded and new lands were given to cultivation, an increasing number of “free” farmers were to be found tilling land that had never been part of a lord’s manor. With the collapse of the feudal structure, farmers in general gradually ceased to be subjects of a master and became subjects of a state.

A similar transformation occurred among the merchants and artisans, who gradually passed from being household retainers of a lord to the status of independent subjects. Thus, the feudal society was completely reshaped in the two centuries preceding the Qin unification.

Cultural change

These great political and socioeconomic changes were accompanied by intellectual ferment, as the people tried to adjust themselves to a rapidly changing world. Ideas about the proper relationships between members of society were naturally questioned when the old feudal order was shaken, and in that period the great teacher Confucius elaborated the social concepts that henceforth became normative for Chinese civilization. In place of rigid feudal obligations, he posited an order based on more-universal human relationships (such as that between father and son) and taught that ability and moral excellence rather than birth were what fitted a person for leadership.

The great thinkers who came after Confucius, whether or not they agreed with his views, were conditioned by his basic assumptions. Mozi, originally a Confucian, based his system on a concept of universal love that was largely an extension of the Confucian idea of humanity; the “worthy man” Mozi recommended as the ideal leader was a development of Confucius’s notion of excellence, combining virtue and ability. Even the individualist thinkers known as Daoists (Taoists), who did not follow Confucius, formulated their teachings as a rebuttal to the Confucian system.

Confucius and other pre-Qin thinkers viewed the traditional political institutions of China as bankrupt and tried to devise a rationale for something to replace them. Some, such as Confucius, put their main emphasis on the quality of the ruling elite group; others, such as Shang Yang (died 338 bce) and Hanfeizi (died 233 bce), regarded a well-organized governing mechanism as the only way to an orderly society. The development of the new centralized monarchical state after the middle of the Chunqiu period is not only the embodiment of the ideas of these various thinkers but also the working premise in the context of which they elaborated their theories. The high degree of social and political consciousness that characterized most of the pre-Qin philosophical schools set the pattern for the close association of the intellectual with government and society in later China.

The burgeoning commercial life of the period also influenced other spheres, especially in the prevalence of contractual relationships. Thus, a minister would roam from one court to another, “selling” his knowledge and service to the most accommodating prince, and the quality of his service was determined by the treatment he received. This kind of contractual relationship remained common in China until the tide of commercialism was ended by the restriction of commercial activity under the Han emperor Wudi in the 2nd century bce.

The local cultures of China were blended into one common civilization during Chunqiu times. Through contacts and interchanges, the gods and legends of one region became identified and assimilated with those of other regions. Local differences remained, but, from that time on, the general Chinese pantheon took the form of a congregation of gods with specific functions, representing a celestial projection of the unified Chinese empire with its bureaucratic society.

Bold challenges to tradition have been rare in Chinese history, and the questioning and innovating spirit of the Chunqiu period was to have no parallel until the ferment of the 20th century, after two millennia had elapsed under the domination of Confucian orthodoxy.