Interstate Cascade Diplomacy / 多国连锁外交
Interstate cascade diplomacy / 多国连锁外交 is the pattern 《资治通鉴·周纪》57丨古代发毒誓还有这作用？ extracts from 子贡 / 端木赐 saving 鲁国. Instead of asking 齐国 not to attack Lu on moral grounds alone, Zigong changes the incentive map across several states.
The cascade begins when Zigong persuades 田常 to redirect Qi away from weak Lu toward 吴国. He then persuades 吴王夫差 to attack Qi, reassures Wu by getting 越王勾践 to appear submissive, and lets Wu’s later conflicts with Qi and 晋国 create the opening for 越国 to destroy Wu.
The concept differs from a single persuasive speech. Its effect comes from chaining multiple actors’ fears, ambitions, and timing constraints until a local threat becomes a changed regional order.
Key Claims
- A weak state can sometimes be saved by changing the whole threat map rather than by resisting directly.
- The same diplomatic intervention can have consequences far beyond the original rescue target.
- The persuader’s skill lies in fitting each message to a different state’s incentives.
- This source makes motive-based talent evaluation concrete: Zigong’s craft resembles later 纵横家外交, but its stated purpose is rescuing Lu.