Why Great Leaders Need People Who Disagree

The Cost of Speaking

In seventh-century Tang China, Wei Zheng advised Emperor Taizong and held office as a remonstrator, an official expected to challenge conduct or policy. The later Jiu Tangshu, volume 71, records his earlier service to Li Jiancheng, Taizong's brother and rival. Past allegiance and the usefulness of present advice were not simply the same question.

Wu Jing's early eighth-century Zhenguan Zhengyao describes Taizong's imposing manner leaving officials unable to speak fluently. It also reports an order admitting remonstrance officials to policy discussions. One reading is that useful advice needs access before decisions harden into commitments. Yet an invitation does not remove the imbalance when the listener controls office and punishment. These passages do not show that everyone felt free to speak, or that fear made an objection true.

The Question Wei Zheng Changed

In its account for 632, Zhenguan Zhengyao describes officials urging Taizong to hold fengshan rites at Mount Tai. They cite military success, signs of favorable rule, and good harvests. Wei Zheng objects without denying those achievements. The contrast is not simply praise against criticism. Positive reports can support a judgment about past achievement without establishing whether a new undertaking is affordable.

Wei's reported argument concerns people still recovering from war, insufficient stores, and sparsely populated stretches of the proposed route. Hosting visitors and rewarding them would create further demands; a flood or drought could make the burden harder to bear. He shifts attention from whether the ruler deserves recognition to whether the population can support this undertaking now. The warning need not disclose facts unknown to Taizong to matter. It can expose consequences that a favorable account of the reign leaves out of the decision.

That does not make the rites pointless. Symbolic authority and relations with visiting rulers could also have value; this is a competing interpretation, not a benefit calculated by the sources. An objection about costs does not establish that every benefit is worthless. Wei's position gives priority to recovery and capacity. The decision requires weighing those claims, not assuming every supporter was flattering or that an opponent's sincerity settled the tradeoff.

From Counsel to a Decision

Zhenguan Zhengyao says Taizong praised the argument and stopped the plan. Zizhi Tongjian, volume 194, presents initial resistance to the rites, then willingness to accept officials' repeated requests; floods precede the plan being shelved. Its Kao Yi, the compiler's examination of conflicting sources, preserves accounts of an unwilling emperor alongside accounts of one dissuaded by Wei. The combined narrative should not be mistaken for a verified change of mind. His initial stance and the relative effects of advice and floods remain uncertain. Cancellation does not prove that proceeding would have caused disaster.

The later Jiu Tangshu records Taizong grieving Wei as a lost mirror. That tribute does not certify every warning or prove unbroken tolerance. Wu Jing's collection selects exchanges to teach governance; it is not a complete record of every accepted or rejected objection. The argument can be useful without making its speaker infallible. Hearing dissent becomes useful when a leader examines the evidence and consequences it raises, even if the final choice remains disputed.