As governments worldwide have begun embracing Sustainable Public Purchasing (SPP), researchers note that we lack a broader conceptual framework that articulates the motivations for public organizations to adopt SPP. SPRI faculty, Shirly-Ann Behravesh, Nicole Darnall, and Stuart Bretschneider address this gap by undertaking a significant literature review and content analysis to develop a cogent framework of SPP adoption. The resulting theoretical framework reveals four critical macro-themes associated with SPP adoption: capacity, culture, stakeholders, and institutional setting.