Happiness is usually experienced as an individual state, yet it is rarely produced by the individual alone. Safety depends partly on the restraint of others and on social order; wealth depends on production and exchange; dignity depends on self-evaluation but also on social recognition; freedom necessarily encounters the freedom of others and public boundaries; and love, understanding, belonging, and trust depend even more directly on the presence of other people. Individual happiness is therefore personally experienced but irreducibly relationally embedded. Building on the Dynamic Coordination Theory of Happiness (DCTH), this paper develops a Relational Embeddedness-Social Transmission Model of Shared Happiness. Shared happiness does not mean the simple sum of individual happiness scores, nor does it require members of a society to have the same emotions, lifestyles, or value commitments. It refers instead to a relational and social condition in which people can pursue different forms of a good life while reducing systematic damage to one another's basic conditions of happiness and expanding the zones in which their pursuits become compatible and mutually supportive through social support, recognition, reciprocal exchange, trust, cooperation, and institutional arrangements. Drawing on research on relational well-being, self-determination, social support, Social Baseline Theory, social capital, and social networks, the paper identifies six mechanisms by which happiness moves from the individual level toward shared social conditions: relational dependence, co-regulation, social recognition, reciprocal exchange, happiness externalities, and trust-institution amplification. Happiness should not be described as if it were a virus that simply spreads from one person to another. A more accurate account is that emotions, behavior, resources, norms, trust, and opportunities can travel through social relationships and alter the conditions under which others pursue happiness. Social transmission is therefore treated as a broad mechanism that includes influence, selection, shared environments, and feedback rather than simple emotional contagion. The paper further distinguishes three progressively richer states of shared happiness: non-harm, mutual support, and mutual enhancement. A Human Happiness Community does not ask individuals to sacrifice their own happiness for an abstract collective happiness. It seeks to enlarge a relational structure in which I can pursue my happiness and you can pursue yours, while our ways of doing so increasingly cease to undermine one another and increasingly become capable of supporting each other.
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Guoping Hua (2026) studied this question.
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