No single actor can solve inequality, unemployment, or climate risk. In this article, we continue our deep dive into the shifts in social investment that are necessary to unlock its power to build a future that works: moving from charity to systemic change, from programmes to partnerships, and from accounting to accountability. Last week, we examined the shift from thinking of social investment as charity to understanding it as a tool for systemic change. Here, we discuss the importance of partnerships in social investment to enable impact at scale.