Columbia subject headings:
Harvard subject headings:
Creation (Literary, artistic, etc.)--Psychological aspects
Creative ability.
Diffusion of innovations.
Necessity (Philosophy)
Risk-taking (Psychology)
Social change.
Social history--Methodology
Princeton subject headings:
Creativity (Psychology)
Diffusion of innovations.
Necessity (Philosophy)
Risk-taking (Psychology)
Social change.
Social history--Methodology.