 Implementation science has traditionally focused on theorizing and assessing context and context-related factors such as implementation climate, organizational culture, and leadership. However, these factors are often conceptualized in a positivist manner, failing to capture the complexities of context. Complexity theory can provide a more holistic approach to understanding context, as it recognizes the dynamic nature of context and its impact on implementation outcomes. By applying complexity theory to implementation science, researchers can better understand how context influences implementation outcomes and develop strategies to address them. This article was authored by Lisa M. Fadenhauer.