The brother relationship between Zhou Gong and Zhou Wu Wang

The Duke of Zhou and King Wu were brothers, a relationship that places the Duke of Zhou’s work within the political transition following King Wu’s accession. In the book’s account, that kinship matters not simply as biography: it helps locate the Duke of Zhou’s interpretations in a period of regency and distinguishes his symbolism from material attributed to King Wen.

Brotherhood and the Transfer of Rule

The book identifies King Wu as the Duke of Zhou’s brother and makes the succession central to its account of the Duke’s work. It suggests that at least the symbolism attached to one hexagram was composed during the troubled regency after King Wu had obtained the throne and his son, King Cheng, had succeeded him. The brotherhood thus connects the Duke of Zhou to both the new king and the unsettled political circumstances in which his interpretation may have taken shape.

This proposed dating is explicitly an inference, not a settled biographical record: the author asks whether the hexagram’s symbolism should be assigned to the regency. The distinction is consequential. A passage associated with King Wen is understood as expressing the outlook of the lord of Zhou before he possessed the throne; the Duke of Zhou’s symbolism, by contrast, belongs to a later setting, after his brother King Wu had secured it.

Family Relations as Political Analogy

The hexagram commentaries repeatedly use household and marriage relations to explain political conduct. In one interpretation, a weak line represents a young woman pursued by a strong suitor whose proposal is unsuitable; after rejecting him, she marries a more appropriate match after ten years. The commentary reads this situation as a figure for choosing the proper authority to serve, turning a domestic relation into counsel about allegiance and political judgment.

Other passages likewise present family roles as models for order and duty. The commentary on Duration connects the preceding figure’s treatment of husband and wife to the continuous observance of their respective responsibilities, while the discussion of family regulation gives the wife firmness and correctness a central place. These examples do not document specific actions by the Duke of Zhou or King Wu in their private lives. They show instead how the book uses kinship and household hierarchy as a language for interpreting relations of authority.

Limits of the Historical Record

The book is more definite about the brothers’ political sequence than about the personal history behind other family references in the hexagrams. Discussing an earlier ruler’s sister and her marriage, the author says that the history of the ruler and his sister is unknown, and rejects an identification proposed by P. Regis as unsupported by the evidence he could find. That caution clarifies the limits of using marriage imagery as biographical testimony: a familial or marital figure in a hexagram may serve its political interpretation without establishing a recoverable historical relationship.

The Duke of Zhou and King Wu’s brotherhood therefore provides a firm point of dynastic context, while the surrounding family analogies remain interpretive rather than personal history. Their relation frames a transition of power; the hexagram commentaries turn comparable bonds and duties into models for political service, restraint, and order.