The article by James Moody and Douglas R. White introduces a hierarchical concept of social cohesion and embeddedness, focusing on structural cohesion based on network node connectivity. Structural cohesion is defined as the minimum number of actors whose removal would disconnect a group, and embeddedness is defined through the hierarchical nesting of these cohesive structures. The authors demonstrate the empirical applicability of nestedness in two different settings: friendships among high school students and political activity among large businesses. They show that network position predicts school attachment and that joint network embeddedness leads dyads to make similar political contributions. The concept of structural cohesion provides a clear and operational measure of social solidarity, linking relational and ideational components of social solidarity. The article also discusses the theoretical implications of structural cohesion and embeddedness, emphasizing their importance in various substantive fields.The article by James Moody and Douglas R. White introduces a hierarchical concept of social cohesion and embeddedness, focusing on structural cohesion based on network node connectivity. Structural cohesion is defined as the minimum number of actors whose removal would disconnect a group, and embeddedness is defined through the hierarchical nesting of these cohesive structures. The authors demonstrate the empirical applicability of nestedness in two different settings: friendships among high school students and political activity among large businesses. They show that network position predicts school attachment and that joint network embeddedness leads dyads to make similar political contributions. The concept of structural cohesion provides a clear and operational measure of social solidarity, linking relational and ideational components of social solidarity. The article also discusses the theoretical implications of structural cohesion and embeddedness, emphasizing their importance in various substantive fields.