Happy

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Marci Shimoff

Self - Narrarator

Ed Diener

Self

Richard Davidson

Self

Mihaly Csikszentmihalyi

Self

Sonja Lyubomirsky

Self

Daniel Gilbert

Self

Gregory Berns

Self

P. Read Montague

Self

The Dalai Lama

Self

Matthieu Ricard

Self

Nic Marks

Self

Tim Kasser

Self

Andy Wimmer

Self

Jamal

Self

Chikanobu Okamura

Self

Anne Bechsgaard

Self

Hiroko Uchino

Self

Kundo Bo

Self

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