Shared ground
Job 24:18–21 uses sharp images to describe a wrongdoer’s end as swift, shameful, and finally erased. The wrongdoer is pictured as something that vanishes quickly on water (v.18), as losing a secure “share” in the land (v.18), and as being swallowed by death as surely as drought dries up meltwater (v.19). The final picture is not only physical death (worms, v.20) but social disappearance: no lasting remembrance, no honored place in family or community memory (v.20). The wrongdoing itself—whether understood as the person or what they built—is said to be “broken” like a tree (v.20). The targets in view are the vulnerable, especially a barren woman and a widow (v.21).
Where interpretation differs
Whose perspective these lines represent. Some read vv.18–21 as Job himself affirming that wrongdoers do, in fact, come to a quick end. Others think Job may be repeating a common, conventional claim (like his friends’ moral logic) in order to challenge it in the flow of his argument about injustice.
What “they don’t turn into the way of the vineyards” means (v.18). Some take it as exclusion from normal, fruitful life (the wrongdoer is cut off from cultivated places). Others take it as deliberate avoidance (the wrongdoer keeps away from places of productive, settled work).
What exactly is “broken like a tree” (v.20). Some read it as the wrong person being cut down. Others read it as their power, household, or unjust gains being snapped.
Why the disagreement exists
The passage is highly poetic and compressed, so it signals meaning through metaphor more than explanation. Also, Job 24 as a whole contains tension: it highlights real-world cases where exploiters seem to get away with harm, yet these verses describe a decisive downfall. That creates a genuine question of whether Job is asserting the downfall straightforwardly, or echoing a claim in order to contrast it with what he sees.
What this passage clearly contributes
Explicitly, the text ties wrongdoing to (1) loss and curse rather than secure “portion” (v.18), (2) inevitable death (v.19), (3) erasure of reputation and legacy (v.20), and (4) predation on those least protected (v.21). As theological inference, it supports the idea that injustice is not morally neutral: even when the timing is debated in the larger speech, these lines insist that the end-state of such evil is collapse and disappearance, not enduring stability.