The hidden power of smiling

Ron Gutman presents a compact but wide-ranging look at what science reveals about smiling — its evolutionary roots, its social contagion properties, and its surprising effects on health and longevity. Drawing on studies spanning infant smiling behavior to baseball card analysis, he argues that smiling is one of the most powerful and underused tools humans have for influencing their own wellbeing and the wellbeing of those around them.

Key Arguments

1. Smiling is universal and innate. Research shows that children born blind smile in response to social stimuli without ever having seen a smile, suggesting the behavior is hardwired rather than learned through imitation.
2. Smiles are contagious and create feedback loops. Seeing a smile activates the orbitofrontal cortex and triggers an automatic mimicry response. This social contagion means one genuine smile can ripple through a social environment.
3. Smiling predicts longevity. A study of baseball card photos found that players with the biggest smiles lived an average of seven years longer than players who did not smile — a finding that has held up to scrutiny as a genuine statistical relationship.
4. Smiling stimulates reward mechanisms. British researchers found that one genuine smile generates as much brain stimulation as up to 2,000 chocolate bars — and without the calories.

Evidence Context

The facial feedback hypothesis, which underpins much of Gutman’s argument, has had a turbulent replication history. A high-profile 2016 multi-lab failure cast doubt on whether the facial expression itself causes the emotional change. However, subsequent well-powered studies have found positive, if modest, effects. The talk’s practical advice to smile more remains reasonable, but listeners should understand that the mechanism is debated and effects are smaller than the talk implies.