Don't mistake oppression and its endogenous partner, repression, for depression.
From the guardian.co.uk
The wisdom of the time was that endogenous depression affected, at the most, about 1 in 1,000 people at some time in their lives.
From the time.com
Endogenous subclinical thyroid disorders, physical and cognitive function, depression, and mortality in older individuals.
From the nature.com
Induction of long-term potentiation and depression is reflected by corresponding changes in secretion of endogenous brain-derived neurotrophic factor.
From the nature.com
There is perilously little research to support the idea of an endogenous fault in the brains of people with depression but huge volumes of evidence that life events play a significant causal role.