Purpose: The purpose of this paper is to investigate the theoretical foundations of the solidarity network concept and its perceived utility as an enabling force for social organizations to influence change. The theoretical framework presented is intended to stimulate dialogue, interest and investigation on the subject of solidarity networks. Design/methodology/approach: The paper adopts a discourse analysis-type approach to developing a theoretical framework for conceptualizing solidarity networks through an analytical review of existing literature on solidarity and solidarity networks. It is through consideration of this literature that the "threads" of a theoretical model for solidarity networks are "woven" together. Findings: Based on the findings of the analysis the paper asserts that the following characteristics are among the defining elements of solidarity networks and help to form the basis of a theoretical framework that strives to create a more cohesive understanding and an applied exploration for future analytical investigations. These characteristics are: support for "broad" values, anti-oppression and vision-based solidarity for the future; the flexibility and adaptability of the network's organizational structure and issue-area(s) of focus; that network members are motivated by a sense of mutuality, or mutual self-interest; that network members are motivated by "high-order" values associated with the "public good"; and that there is a demonstrated ethic of social responsibility and social justice. Originality/value: The paper represents a theoretically-based approach to conceptualizing solidarity networks. It adds new dimensions to one's thinking about social networks as a form of social relationship and social network analysis (SNA) as a "tool" for describing social relationships.