the.com/red line
The threat you draw in sand, then watch the tide ignore.
means A limit you declare you will not let be crossed, after which some response is supposedly guaranteed.
from The literal image comes from lines marked in red on maps and documents to flag critical boundaries or danger zones — red being the universal color of warning and stop. The phrase picked up its diplomatic and military weight through 20th-century usage, especially in Cold War and modern geopolitical rhetoric, where leaders invoked 'red lines' to signal consequences for crossing a threshold. Whether the consequence ever actually arrives is a separate, more cynical story.
- origin
- 1918 slang from literal battlefield maps
- diplomacy use
- credible only if breaking it costs you too
- syria 2013
- obama drew one, chemical weapons crossed it anyway
- psychology
- the more public the line, the harder to back down