This book compares the evolution of the legal systems of Central Asia, Europe, and East Asia, under the impact of economic factors, both structural and crisis-inspired. The COVID-19, one of the severest challenges faced by humanity, alters the social order and the way people think. Already, changes impact the socio-economic and political-legal spheres. Geopolitical and geoeconomic shifts affect the place of states and regions in the world order. The UK's withdrawal from the EU, superimposed onto the pandemic, inflicted not only political and socio-economic losses but reputational losses as well. It signaled the limits of regional integration if the world's most successful economic grouping needed to revise its own development. This book analyses three salient international political/legal problems for states and regions of Eurasia: trade and financial issues, regional and interregional issues, industrial and socioeconomic issues. It also looks at the US trade policy towards Eurasia and China, the US military presence in South Korea, the EU experience for the EAEU, as well as WTO issues, etc. It follows Le regionalisme et ses limites (2016), Mutations de societe et reponses du droit (2017), On the European and Asian origins of legal and political systems (2018) and The Challenge of change in the legal and political systems of Eurasia and the New Silk Road (2020).