This article provides the theoretical underpinnings for the concept of macro-social marketing. Macro-social marketing seeks to use social marketing techniques in a holistic way to effect systemic change, as opposed to individual level change. The article provides the conceptual roots of the concept derived from systems theory and institutional theory. It starts by explaining what types of macromarketing issues – dubbed here wicked problems – can be approached using macro-social marketing. Systems theory is then used to explain the interconnectedness of wicked problems throughout the social and cultural systems, as well as the material environment and marketing system (Dixon 1984). Subsequent sections apply institutional theory to explain how systemic change can be brought about through the use of macro-social marketing, and discuss change at a broader conceptual level, as well as how this process then trickles down to individual organizations within the marketing system.