What is Complexity Theory

This chapter discusses the key theoretical and empirical steps undertaken throughout the authors' previous-but-related mixed methods studies on social innovation in nonprofit organizations (NPOs) in the Australian disability sector with the aim of using the key findings of these studies to develop ‘theories-in-practice' in disability NPOs. In this chapter, the authors summarize the associated theory-building processes deployed to explain how disability NPOs develop and implement social innovations and the societal ‘system-level' impacts of such innovations. These theory-building processes involve two broad phases, and the culmination of these phases (grounded in the abductive logics of inquiry, complexity theorizing, and set-theoretic methods) leads to the development of several ‘theories-to-practice' that not only convey the interactivity of contextual causal mechanisms leading to social innovation by NPOs, but also outline change-oriented solutions for managers who are working to address complex social challenges.