This volume is the result of the project NextStepEU Jean Monnet Module “Challenges, Opportunities, and Policies for Sustainability in the European Union”, grant decision number 101085160/31.08.2022), supported by the Erasmus+ Programme of the European Union, and reunites a selection of the papers presented at the NextStepEU International Conference “Challenges, Opportunities, and Policies for Sustainability in the European Union”, organized at Alexandru Ioan Cuza University of Iasi, Faculty of Economics and Business Administration, during 29th and 31st of May 2025.