"Happiness" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus,
MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure,
which enables searching at various levels of specificity.
Highly pleasant emotion characterized by outward manifestations of gratification; joy.
This graph shows the total number of publications written about "Happiness" by people in this website by year, and whether "Happiness" was a major or minor topic of these publications.
To see the data from this visualization as text, click here.