This chapter is the first of four looking at different forms of investment and how deeply sustainability is now embedded. Despite political backlash and high-profile retreats from climate alliances, private finance is now structurally tied to sustainability risks, making a full reversal improbable. While rhetoric around ESG has softened, banks, investors, and regulators have already integrated climate and sustainability considerations into risk models, stress tests, disclosure rules, and capital allocation. The chapter shows that capital continues to flow into renewables, electrification, grids, storage, and climate-related infrastructure because economic fundamentals—not virtue—now drive investment. Private equity and China’s industrial strategy particularly demonstrate this shift, while emerging economies still struggle due to inadequate risk-sharing mechanisms. Sustainable finance advances when market rules, incentives, and governance structures align with long-term systemic risks. Remaking sustainability therefore requires strengthening these foundations, not relying on voluntary commitments or rhetoric alone.