An advocacy coalition is a group of political actors who share important policy beliefs and coordinate their activities in a particular policy subsystem in order to influence policy development or implementation. The concept is most closely associated with the Advocacy Coalition Framework developed by Paul Sabatier and Hank Jenkins Smith as a theory of policy processes and policy change.
Advocacy coalitions can include interest groups, government officials, legislators, researchers, businesses, professional organisations, social movement organisations, and other actors rather than consisting exclusively of formal organisations of the same type. The defining feature is not merely cooperation on one temporary issue but a meaningful degree of shared policy beliefs combined with coordinated activity within a policy domain. Cambridge research describes advocacy coalitions as actors sharing policy beliefs and resources who work to translate those beliefs into policy change within a policy subsystem.
The Advocacy Coalition Framework emerged during the 1980s as an alternative to approaches that treated policymaking primarily as a sequence of stages such as agenda setting, formulation, implementation, and evaluation. Sabatier and Jenkins Smith sought a causal framework capable of explaining policy change and stability over longer periods. The framework focuses on policy subsystems defined by a substantive policy area and geographical scope, such as environmental policy, energy policy, transport policy, telecommunications, water management, or education. Actors within such a subsystem are expected to hold different beliefs about problems, causes, appropriate solutions, and desirable policy outcomes. Advocacy coalitions provide a way of explaining how actors with shared beliefs coordinate resources and strategies over time.
A central element of the framework is the belief system. Advocacy Coalition Framework analysis commonly distinguishes deep core beliefs, policy core beliefs, and secondary aspects. Deep core beliefs concern fundamental normative and ontological assumptions and are generally difficult to change. Policy core beliefs concern the basic normative and empirical commitments applied to a particular policy subsystem and are more directly relevant to identifying coalitions.
Secondary beliefs concern narrower issues, implementation details, instrumental choices, and tactical preferences and are generally more susceptible to revision. The framework therefore does not assume that every disagreement has the same depth. Two actors may share broad principles while disagreeing over specific implementation mechanisms, or they may agree about technical details while fundamentally disagreeing about the underlying objectives of policy.
Advocacy coalitions are not synonymous with political parties or interest groups. A political party normally has an electoral organisation and seeks governmental office, whereas an advocacy coalition can include members of multiple parties and organisations. An interest group is generally an organisation or association seeking political influence on behalf of particular members or causes, whereas an advocacy coalition is an analytical grouping of multiple actors based on shared policy beliefs and coordinated behaviour. A coalition may therefore include an environmental organisation, sympathetic legislators, civil servants, researchers, professional associations, and businesses if they share relevant policy core beliefs. The coalition concept captures cross organisational cooperation that would be invisible if researchers examined only formal organisations.
Advocacy coalitions seek to translate beliefs into policy through resources and strategies. Resources can include formal authority, financial resources, public support, expertise, information, organisational capacity, mobilisation networks, access to decision makers, legal authority, media visibility, and public legitimacy. Strategies can include lobbying, public campaigning, research publication, litigation, coalition building, electoral activity, consultation participation, administrative advocacy, communication campaigns, and attempts to alter how a policy problem is understood.
Coalitions may also attempt to influence the implementation of existing policy rather than merely its formal adoption. The effectiveness of a strategy depends on institutional arrangements, political opportunities, the distribution of resources, public opinion, competing coalitions, external events, and the openness of relevant decision making institutions.
The framework also incorporates policy oriented learning. Actors can acquire information, revise technical beliefs, reassess causal assumptions, and alter policy strategies through sustained interaction within a policy subsystem. However, the framework generally expects fundamental normative beliefs to be more resistant to change than secondary technical beliefs. Information is therefore not politically neutral in its effects. Actors interpret evidence through existing belief systems, and evidence that challenges deeply held assumptions may be discounted or contested.
Research on policy networks and the Advocacy Coalition Framework has examined how shared beliefs and relationships influence information exchange, collaboration, and learning. The framework thus treats policy change as involving not only changes in material resources and political institutions but also changes in knowledge, perceptions, strategies, and beliefs.
Policy brokers are another important component. A policy broker is an actor who seeks to reduce conflict between competing coalitions and facilitate acceptable policy compromises while remaining part of the wider policy subsystem. Brokers may be political officials, administrators, institutions, or other actors positioned to communicate across competing groups. External events can also alter the balance between coalitions.
Changes in socioeconomic conditions, public opinion, governing coalitions, technology, crises, or decisions in related policy areas can modify available resources and political opportunities. The Advocacy Coalition Framework therefore distinguishes relatively stable parameters from shorter term events and subsystem dynamics. Policy change may result from shifts in coalition resources, external events, policy learning, negotiated compromise, or combinations of these mechanisms.
The concept is useful because it explains why policymaking can remain stable for long periods even when governments change, while also explaining how substantial policy change can occur. It focuses attention on actors outside formal government, long time horizons, belief systems, resource mobilisation, information exchange, and interactions within policy subsystems. However, advocacy coalitions should not be treated as perfectly cohesive organisations. Members can disagree over tactics, secondary beliefs, resources, and implementation while continuing to share important policy core beliefs.
The empirical identification of coalitions can also be difficult because researchers must establish meaningful belief similarity and coordination rather than simply grouping actors who happen to support the same policy at one moment. The framework is consequently an analytical model for understanding policy processes rather than a claim that every political conflict naturally divides into two fixed and internally unified camps.
