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Glossary

Social isolation

Defined in topic 29

The objective state of having few contacts, distinct from loneliness, the felt lack of the connection you want. Pooled studies link isolation to 29% higher odds of dying during follow-up.

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Where this comes from

In the reference topic that owns this term

Reference topic 29, The Social Animal in Solitary Confinement, states the mismatch as a card: what the system evolved to expect, what it gets instead, and what happens in the gap.

Mismatch card

What it expects

Daily, face-to-face, reciprocal contact with a small stable band, inside a wider network of roughly 150 known people.

What it gets

Fewer confidants than a generation ago, most waking contact mediated by screens, and a follower count standing in for a circle.

What happens in the gap

Chronic activation of threat and stress systems, and higher mortality in isolated and lonely people across dozens of cohorts.

The full card, and the topic behind it

What that chapter recommends

The graded recommendations in Reference topic 29, strongest evidence first. How the grades work.

  1. Feed the inner circle before the outer ones

    ProbableEvidence grade: Probable. Good observational evidence with a plausible mechanism, or small or few trials.

    Longitudinal and observational evidence converges on the quality of a few close relationships, not the size of a network. In practice that means recurring, reciprocal, in-person contact with the same small group.

    Read it in full

  2. Use touch

    ProbableEvidence grade: Probable. Good observational evidence with a plausible mechanism, or small or few trials.

    In the only randomized trial cited here, 30 minutes of reciprocal warm touch, three days a week for four weeks, raised oxytocin and lowered blood pressure and cortisol in married couples.

    Read it in full

  3. Aim at contact time, not at the feeling

    EmergingEvidence grade: Emerging. Early, small, animal-only, or actively contested.

    The evidence that people spend more time alone is stronger than the evidence that they feel lonelier, and time is the variable you can move.

    Read it in full

Graded recommendations elsewhere that mention Social isolation

  • Keep people in your weekEvidence grade: Probable. Good observational evidence with a plausible mechanism, or small or few trials.Topic 3

The argument behind this term, its studies and its notes are in Reference topic 29 of the reference library. The book gives the practical version. Get the book.