This article explores the importance of integrating different levels of understanding to improve outcomes for individuals with acquired brain injury (ABI). The author emphasizes the value of collaboration and holistic thinking, drawing inspiration from a neuropsychology conference and a book on collective intelligence. The article also highlights the significance of qualitative research in uncovering systemic factors and presents two qualitative studies that emphasize the importance of understanding the social and systemic context surrounding individuals with ABI. Additionally, the article discusses the problem to implementation cycle in ABI rehabilitation research, emphasizing the need for evidence-based interventions, clinician competencies, and real-world implementation to address the access problem. The author provides an example of memory rehabilitation post-stroke to illustrate the challenges and barriers to implementation. The text emphasizes the need for collaboration, joining communities of practice, and advocating for systemic changes to support evidence-based practice, while considering individual, clinician, and system-level factors to optimize outcomes for people with brain conditions. [Extracted from the article]