AbstractA significant undiscussed problem with the leading conceptualization of ideologically based judicial behavior, Jeffrey Segal and Harold Spaeth’s attitudinal model, is its lack of theory. This problem leads to circular reasoning, ad hoc coding adjustments, and inaccurate characterizations and explanations of case outcomes, judicial votes and ideologies, and trends in judicial behavior. A values-based theory of ideology, such as the cultural theory pioneered by Mary Douglas, Michael Thompson, Aaron Wildavsky, and others, can help remedy this problem. Applying this cultural theory to First Amendment cases, we find that political cultures valuing equality, order, and liberty provide a more accurate account of judicial decisions than labeling them liberal or conservative.