A fish rots from the head down
Meaning
Leadership problems tend to infect the whole group.
Usage
Used to point to bad leaders when blaming an organization.
Origin & History
Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.
Fishermen noticed spoilage beginning at a fish head, so it symbolized leadership decay.
Appears in moral tracts and political critiques since the 1800s.