Lex Proficia is a prestigious academic forum that provides a platform for in-depth discussions on critical issues in international society. Organized by the Faculty of Law at Universitas Diponegoro, this summer course is part of a broader international program covering various areas of law. The program aims to engage experienced international participants in critical discussions on contemporary issues, bringing them together with distinguished scholars, activists, professionals, and representatives from international organizations. Held virtually, the course will run intensively from May 5 to May 22, 2025, targeting international students from universities worldwide. This year, the Summer Course proudly presents the theme: Triple Planetary Crisis and Solvency: Climate Justice, SDGs, and Human Catastrophe. In the short term, we hope to provide participants with firsthand exposure to the complexities of the triple planetary crisis and its possible solutions, fostering critical thinking and encouraging comparative legal analysis across different jurisdictions. In the long term, we envision Lex Proficia as a catalyst for international collaboration, facilitating student exchanges, joint research initiatives, and other forms of academic cooperation between universities. Additionally, we aim to strengthen partnerships with both local and international institutions to enhance the impact and continuity of the summer course in the years to come