Social work relies heavily on its value base to guide practice; however, there are no conceptual models--on par with person-in-environment (PIE)--to describe how these values are implemented within an evidence-based approach. However, the philosophical foundation of empiricism and positivism that lends PIE its strength also brings with it inherent weaknesses: Namely, empirical observation cannot produce value judgments, and positivism's verification of causality cannot capture the workings of free will. Postmodern thought is uniquely suited to address these shortcomings. Its philosophical foundation of phenomenology and social constructionism speak to a value-based approach to practice and hold out the promise of engendering conceptual models that can illustrate these values in action.