The chapter focuses on the impact of globalization on public international law in times of anti-globalism and populism, where globalization itself has increasingly become contested. It submits that traditional public international law has been dangerously unreceptive in capturing new transnational regulatory actors and normative dynamics, which makes it more vulnerable to anti-globalist and populist attacks. It looks into the corresponding rise and certain features of ‘informal international law-making’ and ‘global governance’, as they may offer some responses to, or at least some defences against, anti-globalist and populist politics. It also addresses the current challenges which traditional forms of international law-making, like treaties and customary international law, are currently going through. It concludes that public international law will have to adapt to both the challenges of globalization and anti-globalism, if it is to remain relevant in regulating international life in the twenty-first century.
