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
Origin notes can vary by region and source; this page gives the commonly reported explanation and usage context.
Fishermen noticed spoilage beginning at a fish head, so it symbolized leadership decay.
Appears in moral tracts and political critiques since the 1800s.