ABSTRACT This introductory review essay examines some of the key concepts and approaches framing the ongoing debate around mixed communities and housing regeneration policies around the world. This review summarizes past positive and negative side effects of social mix reported in the extant international literature. It then describes social mix housing policies in the Global East and the Global South, including China, Japan, South Korea, sub-Saharan Africa, and Singapore. In moving forward, the review essay adopts Galster and Friedrichs’s challenge to think about the progressive reformation of a “social mix version 2.0”—what it might look like, and what the policy implications of such an improved version of social mix might be. Three policy implications are discussed: intentionality of social mix; mixed-income housing transit-oriented design; and learning from the Global East and Global South.