England's antidepressant boom

Depression without a biomarker is the human brain doing its job: pulling effort off a life where effort has stopped changing anything, trusted people are thin and standing is low. In modern England, work, rent and benefits are decided by people nobody knows and nobody can walk away from. The pull-back saves energy and risk for goals that pay off in survival, mates and children, and switches off when effort pays again or a person moves camp, and there neither comes.

Source: Medicines Used in Mental Health - England 2016/17 to 2025/26: Antidepressant drugs (BNF 4.3), NHS Business Services Authority (NHSBSA), 23 July 2026

Then For 300,000 years, the people you lived with saw it when you went quiet.

Now Feeling low for weeks when life stops paying off is completely normal.

The pull-back fires where effort stops showing results. For most of human history, work was done in small groups with the hands, its results were plain to see, and adults settled group decisions by discussion. Women are 65% of patients and 71% of those aged 15 to 19. A mother's commitment to each child tracks the help and food around her, and forager mothers had fathers, grandmothers and older children helping, where today one or two adults carry most of the care; no study here tests whether that drives the skew.

Forager bands had no rulers, and anyone could walk to another camp without penalty, which changed every input at once. Standing came from skill and sharing, granted by people who knew you, and better hunters and storytellers had more children.

In a band, the pull-back eased when a person's own actions worked again or a small inner circle of trusted people closed in. England's answer is a prescription, and the release counts 44% more patients in the most deprived areas than in the least.

Calling it a serious illness when no biomarker shows a physical cause stops the explanation at a label. Where a thyroid fault or inflammation with a marker exists, the low mood is a symptom of that cause. The release admits its 9.1 million patients include people prescribed for migraine, chronic pain and ME, since it records no reason for any prescription.

What they say it is

They say

Low mood that lasts for weeks is a serious illness, clearly separate from ordinary unhappiness, so rising prescriptions measure rising illness.

"It is a serious illness and very different from the common experience of feeling unhappy or fed up for a short period of time."

Held by the release's background framing of depression (section 1.1).

What it really is

Depression without a biomarker is the human brain pulling effort off a life where effort has stopped changing anything.

Which system wins

Every brain system that could explain this, oldest at the top. The bar is how well each one explains the source.

Oldest firstScore, out of 1

600million yrs

M8 Immune Regulation

Inflammation as the mismatch

Standing1 of 11 detailscarries the signal, never leads
500million yrs

M14 Reproductive Motivation

Girls' low mood from competition on looks

Reproduction2 of 11 detailsexplains who, not why
200million yrs

M3 Social BondingWins

Low mood as a social signal

Standing4 of 11 details
50-100million yrs

M5 Status Monitoring

Low rank and little control (Whitehall)

Standing1 of 11 details
no system

No Cor system

Chemical imbalance or not

Standing2 of 11 details

What is at stakeDetails explainedDistance from the camp

Why it wins. Low mood as a social signal explains 4 of the 11 details in the source and sits on standing. Girls' low mood from competition on looks scores higher (0.56) but only explains who is hit harder, not why it happens.

The 11 details and the scores as a table

D1 96 million antidepressant items in 2025/26, up 3.1 percent.
D2 turning point 9.1 million patients, up 2.2 percent and 27 percent above 2016/17.
D3 The most deprived areas have 44 percent more patients than the least deprived, and 11.6 against 8.6 items each.
D4 65 percent of patients are female.
D5 71 percent of patients aged 15 to 19 are female.
D6 63,600 patients aged 17 and under, up 1.6 percent.
D7 Sertraline rose from 12 to 26 million items; SSRIs are 52 percent of items.
D8 Clinical indication is not captured, so the figures are not only for depression.
D9 NICE says psychological therapy comes first for less severe depression.
D10 The release calls depression a serious illness, very different from short-lived unhappiness.
D11 Official statistics, NHSBSA, BNF section 4.3.

Reading	System	At stake	Details	Distance	Score
Low mood as a social signal	M3	Standing	4/11	2/3	0.36
Low rank and little control (Whitehall)	M5	Standing	1/11	2/3	0.30
Chemical imbalance or not		Standing	2/11	0/3	0.23
Girls' low mood from competition on looks	M14	Reproduction	2/11	3/3	0.56
Inflammation as the mismatch	M8	Standing	1/11	0/3	0.21

Score = 0.571 x what is at stake (survival 1, reproduction 0.67, standing 0.33) + 0.286 x share of details explained + 0.143 x distance from the camp. Phylogenetic age adds no points; it orders the stack and settles near-ties.

So now what?

Join or start a small group where your effort shows a result you can see that week, such as a shared allotment, a repair group or a team job with people you know.
Put the same few trusted people in the same room every week, a meal or a walk on a fixed day, so someone from your own life shares the load.
Get together with neighbours in the same street or building to take one demand to a landlord or the council, so the people who set your terms face a group that knows each other.

If you take psychiatric medication: where no biomarker shows a physical disease, the goal is to come off it. Work on the real cause, most often your situation with other people, at the same time as a slow taper supervised by your doctor. Never stop suddenly: stopping some drugs at once is dangerous.

How do we know?

8 claims, 7 counterpoints

Under prolonged hardship that no action could change, the brain's built-in move was to stop spending effort and lie low, switching that off when it saw its own actions work. Low mood pulls effort, energy and risk away from goals that cannot be reached and toward ones that pay off in survival, mates and children.
E65 seen in animals E66 seen in animals E441 seen in animals E137 argued, not yet tested E350 argued, not yet tested E357 argued, not yet tested
Forager mothers raised children with help from fathers, grandmothers, older children and others, and a mother's commitment to each child depends on whether she reads enough help and food to carry it through.
EEA-CARE-01 tested many times E271 argued, not yet tested E281 argued, not yet tested E402 argued, not yet tested
For most of human history work was done in small groups, with the body and with skill, and its results were visible.
E583 argued, not yet tested
Forager bands had no rulers, adults settled group decisions by discussion, and anyone could move to another camp without economic penalty.
EEA-SOC-10 contested E21 argued, not yet tested E677 argued, not yet tested E688 tested many times E371 argued, not yet tested
In forager bands lasting standing came from prestige such as skill and sharing, granted by others who chose to listen, and better hunters and skilled storytellers had more children.
EEA-SOC-10 contested E689 tested many times E742 tested once E770 tested many times
Close support came from a small inner circle of confidants inside a camp of a few dozen familiar people, and the return to calm after an alarm often came through other people.
EEA-SOC-01 contested E404 tested many times EEA-SOC-03 tested many times E754 tested many times EEA-THREAT-03 argued, not yet tested
In 2025/26 about 9.1 million patients in England got antidepressants, 44% more in the most deprived areas than in the least, and women were 65% of patients and 71% of those aged 15 to 19.
the source
The release says antidepressants are also prescribed for migraine, chronic pain and ME, and that it records no clinical indication. Where a measurable physical cause such as inflammation is present, the withdrawal and low mood are a symptom of that cause.
the source E224 seen in animals E308 argued, not yet tested

What cuts against it

Nesse holds that low mood often escalates into depression that serves no purpose, and that psychotic depression comes from broken mood regulation. An immune response alone produces the same withdrawal in animals, whatever the controllability. The control circuit is charted mainly in rodents, and human brain imaging support is thin. Ancestral life also carried losses no action could prevent: about 49 percent of forager children died before 15.
E357 argued, not yet tested E355 argued, not yet tested E358 argued, not yet tested E224 seen in animals E441 seen in animals E724 tested many times
Nesse places psychotic depression and mania in a separate class of broken mood regulation, with no validated marker. Cor records this as a challenge and applies the biomarker line instead.
E358 argued, not yet tested E355 argued, not yet tested
Where a measurable physical cause exists, such as inflammation with a marker, a thyroid fault or a medication or substance effect, the low mood is a symptom of that cause. The source cannot separate those patients.
E308 argued, not yet tested E224 seen in animals
Low mood has other routes: prolonged separation distress can give way to despair, and an underactive seeking system produces a form of low mood of its own. Not every drop in drive is disengagement from a goal.
E526 argued, not yet tested E264 argued, not yet tested
Much of ancestral life lay beyond one's own action. Big-game hunts rarely succeeded, about half of forager children died before 15, and most marriages were arranged by kin.
E810 contested E724 tested many times E690 tested many times
The Whitehall data on control at work are observational, and learned-helplessness findings come mainly from rodents.
E441 seen in animals E442 argued, not yet tested E161 tested once
Exercise trials for low mood show moderate effects against active controls, smaller than earlier claims.
E667 tested many times

Not in Cor yet

Primary care records show what share of antidepressant items in England are prescribed for depression as opposed to pain, sleep or migraine.
Analysis of indication codes in English primary care prescribing records (for example CPRD or OpenSAFELY)
The deprivation gradient in prescribing reflects higher rates of low-control work, debt, poor housing and loneliness in deprived areas.
Area-level study linking IMD domains to antidepressant prescribing in England
The female skew in antidepressant prescribing (65% of patients, 71% at ages 15 to 19) reflects a sex difference in how the care and reproductive systems read missing help.
Cross-cultural or forager study of sex differences in low mood in relation to help with child-raising

Grades are Cor's. Every id opens its Cor page.

Sources

Medicines Used in Mental Health - England 2016/17 to 2025/26: Antidepressant drugs (BNF 4.3). NHS Business Services Authority (NHSBSA), 23 July 2026. The source decoded here.
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