Trust

Because almost every exchange depends on it, and because trusting usually pays. People judge three things, ability, care and honesty, often from quick and unreliable cues. Most people are more trustworthy than we expect: in one set of experiments people predicted half of strangers would honour their trust, and 80 per cent did.

What the report found

1. Most people are more trustworthy than we expect. In one set of experiments people predicted that about half of strangers would honour their trust; 80 per cent did. Lost wallets with money in them were returned more often than wallets without.
2. We judge three things: ability, care and honesty. Whether a person can do the job, whether they want good things for us, and whether they keep to principles we accept. Faces and first impressions supply quick, confident and often wrong answers to all three.
3. Reputation lets trust travel between strangers. Reviews and ratings move sales, and a strong reputation can outweigh our habit of trusting people who resemble us. Trust is lost much faster than it is gained.
4. The evidence for a trust hormone is mixed. An early study found that a nasal spray of oxytocin raised trust. Later reviews and a large preregistered replication did not find the same effect.
5. Our default is to believe, and it is usually right. People spot lies only slightly better than chance, and repetition makes claims feel true. The aim is not more trust or less, but trust placed where it has been earned.

What is inside

1. What trust is and why we have it
2. Reading people
3. Borrowed trust: reputation and reviews
4. The trusting brain
5. Trust across life, and in machines
6. When trust misleads us

Plus a force map of where trust shapes everyday choices, a glossary and the full list of sources.

Who it is for

For anyone who asks people to believe them, and anyone deciding whom to believe.

How we work

Human Forces reports explain one deep need and the effects that grow from it. Every claim is graded Established, Emerging or Untested. Where researchers disagree, as they do on the trust hormone and on trust in algorithms, both sides are set out before we say where we stand.

Cite this report

The Why We Project (2026) Trust: Why we believe strangers, brands and machines. Human Forces No. 01. Dubai: Why We Tech Ltd. Available at: thewhyweproject.com