After King Wu overthrew the last ruler of Shang, marking the transition to the Zhou Dynasty, the victor was honor-bound by feudal etiquette to allow the defeated house to continue offering sacrifices to their ancestors. As a result, for a time Shang became a vassal state of Zhou, with the Shang heir Wu Geng allowed to continue ancestor worship at Yin. This practice was referred to as Èr wáng Sān kè. However, after King Wu's death, Wu Geng fomented a rebellion with an alliance of eastern states, and was killed by the Duke of Zhou. Another Shang royal family descendant, Weizi, was granted land at Shangqiu, where the capital of the new State of Song was built. A sign of its descent from the Shang is that the Song in its early period followed the succession principle of agnatic seniority, rather than agnatic primogeniture like the Zhou.
History
In 701 BC, a political marriage between Lady Yong of Song and Duke Zhuang of Zheng empowered Song to manipulate the administration of Zheng. In 651 BC, Duke Huan of Song died, leaving the district to be ruled by Duke Xiang, who reigned from 651 to 637BC. He was considered a Hegemon by some, but was unable to maintain that role. He eventually fell to the troops of Chu. In 355BC, Dai Ticheng, a distant relative of the ruling royal line and once a minister of Duke Huan II, managed to usurp the throne. In 328BC, Dai Yan, a younger brother of Ticheng, took the throne and declared himself to be King Kang of Song, with Ticheng murdered or exiled. The king was ambitious and had succeeded in beating troops from Chu, Wei and Qi and annexing Teng. However, the kingdom was finally annexed by Qi in 286BC, with troops from Chu and Wei serving on behalf of Qi. Qin, which had been an ally of Song, refused to intervene for strategic and diplomatic reasons after being convinced by Su Dai from Wei. Su's predictions were proven correct and Qin benefited from the downfall of its former ally. The philosopher Mozi references this state in the chapter "Obvious Existence of Ghosts", in which he mentions a number of Spring and Autumn Annals, including those of the Zhou, Yan, and Qi. The Spring and Autumn Annals of Song has not survived.
Rulers of the state
Unless otherwise indicated, the ruler is the son of his predecessor.
Weizi 微子, brother of the last king of Shang, Di Xin
Duke Wen 宋文公, 610-589, younger brother of the above
Duke Gong 宋共公, 588-576
Duke Ping 宋平公, 575-532
Duke Yuan 宋元公, 531-517
Duke Jing 宋景公, 516-451
Duke Zhao II 宋昭公, 450-404, great-grandson of Duke Yuan; possibly 468-404, making him one of the longest-reigning monarchs.
Duke Dao 宋悼公, 403-396
Duke Xiu 宋休公, 395-373
Duke Huan II 宋桓公, 372-370
Ticheng, Lord of Song 宋剔成君, 369-329, descendant of the 11th duke, Dai
Yan, King of Song 宋王偃, King Kang 宋康王, 328-286, younger brother of the above
Descendants
was a descendant of the Dukes of Song, as are his descendants, the Dukes of Yansheng. The title of Duke of Song and "Duke Who Continues and Honours the Yin" were bestowed upon Kong An |孔安 by the Eastern Han dynasty because he was part of the Shang dynasty's legacy. This branch of the Confucius family is a separate branch from the line that held the title of Marquis of Fengsheng village and later Duke Yansheng.