Strength of Ties

Mark Granovetter’s influential 1973 theory, “The Strength of Weak Ties,” advanced how we understand social networks. Before Granovetter, sociologists believed that strong, close relationships like those with family and close friends were the most valuable. Granovetter showed that while strong ties are important for support and trust, it’s our weak ties— casual acquaintances and distant contacts—that often bring us new information and opportunities.

Granovetter described the importance of the bridging function of weak ties that connect otherwise separate clusters of people, serving as crucial conduits for new ideas, resources, and opportunities. These bridges make it possible for information to travel further and faster across a network.  The strength of ties is important in other frameworks, like the Collaboration Spectrum, which suggests that ties range from weak to strong in association with turf and trust.

Granovetter highlighted how individual-level interactions (micro) could aggregate to produce broader societal patterns (macro), such as the diffusion of innovations, job opportunities, and even collective action.  He also emphasized that the value of a social tie was not just about the number of connections (centrality), but also about the diversity and reach of those connections.  Network theory formalizes these ideas in the form of nodes, and edges, and allows for numerical analysis of a network’s structure and properties.