As a result of the significant need for additional discussions on the inequality which currently shape international tax matters, Copenhagen Business School hosted a conference concerning inequality within the international tax regime in September 2020. The conference brought together researchers at the forefront of their respective fields to identify, discuss, and to underline future challenges associated to inequality in the international tax context. This special issue is an outcome of papers presented at the conference and concerns the relationship between developing and developed states with an emphasis on present shortcomings when allocating taxing rights in a fair and sustainable manner.