This document discusses paradigms and professionals in sustainable development philosophy. It covers changes in thinking from science to systems approaches, the demise of narrow scientism in favor of holism, and a range of systems approaches to problem solving like soft systems methods, learning organizations, participatory rural appraisal, and logical frameworks. Emerging premises for sustainable development include using sustainability as a measure of system wholeness, acknowledging stakeholder subjectivity, and developing participatory tools to further thinking and modeling.