Polina Christodoulou and Marina K. Vassiliou contribute the "Investor-State Arbitration and the Next Generation of Investment Treaties" chapter in Part VII: Multilateral Treaties. In this chapter, they take a close look at the latest trends in the investment treaty landscape, and discuss updates and investor-state dispute settlement (#ISDS) reforms in significant multilateral investment treaties across the globe and in bilateral investment treaties (#BITs), including modified provisions that promote sustainable development, climate change considerations and human rights.