Shared ground
The speaker presents a case of “under the sun” that he considers “great” (v.13). The story stresses a major power imbalance: a “little city” with “few men” is trapped by a “great king” who builds siegeworks (v.14). Against expectation, the city is “delivered” because a “poor wise man” is found there (v.15).
The ending is part of the point: after rescue, the savior is not remembered (v.15). The passage holds together two observations at once: wisdom can be practically effective in extreme situations, and social memory can still ignore the person who provided it—especially someone “poor.”
Where interpretation differs
Some readers treat this as a report of something that actually happened. Others treat it as a teaching story that is realistic but not tied to a specific historical event. Either way, the passage’s message depends on what the story highlights, not on identifying the city or king.
There is also some uncertainty about what “delivered the city” involved. It could mean strategic planning, persuasive counsel, a clever tactic, or negotiation. The text gives the outcome (the city is saved) without narrating the method.
Why the disagreement exists
The speaker introduces the account as something he “saw” (v.13), which sounds like eyewitness-style reporting, but he also tells it in a compressed, lesson-like way with no names or details. Likewise, “delivered” is outcome-focused language that can cover several kinds of wise action, so interpreters fill in the missing steps differently.
What this passage clearly contributes
Explicitly, it contributes a grounded claim about life “under the sun”: wisdom can outweigh raw power in a crisis (vv.13–15). It also contributes a sober claim about recognition: even decisive, life-saving wisdom may not secure lasting honor for the wise person (v.15).
By inference, the passage supports a theme that continues in Ecclesiastes: outcomes and reputations are not reliably tied to merit, status, or strength. The wise can succeed and still be overlooked; effectiveness and public reward do not always travel together.