Happiness vs friendships

From the "Science for Raising Happy Kids"

The upshot of 50 years of happiness research is that the quantity and quality of a person’s social connections—friendships, relationships with family members, closeness to neighbors, etc.—is so closely related to well-being and personal happiness the two can practically be equated. People with many friendships are less likely to experience sadness, loneliness, low self-esteem, and problems with eating and sleeping.

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