List of Articles Great Powers Open Access Article Abstract Page Full-Text 1 - Analyze of data in order to predict crises on meddle est mohammd kazem kaveh pishgadam 10.30495/pir.2020.674151 Open Access Article Abstract Page Full-Text 2 - The Impact of Nuclear Weapon on Continuation of Imbalance Unipolar Structure Mohammad Hatami Syed Mehdi Parsaei Sajed Bahrami Moghadam Open Access Article Abstract Page Full-Text 3 - The Role of Space in Cooperation and Competition Between Great Powers Maryam Dorri Vernosfaderani Ardeshir Sanaie Alireza Soltani Kabak Khabiri Open Access Article Abstract Page Full-Text 4 - The role of the Taliban in the power structure of Afghanistan and its impact on the future of Iran-Afghanistan relations Nesa Zahedi roohullah ghasemian Reyhane Dehghani Open Access Article Abstract Page Full-Text 5 - A Survey of the Yemeni Crisis: Developments, Roots, Actors and Strategies for the End of the Crisis Garineh Keshishyan Siraki soheil soheiy najafabadi Open Access Article Abstract Page Full-Text 6 - The impacts of Disagreements between European Union Member States Over this Union’s Positions in the World System Seyed Hassan Mir Fakhraie Open Access Article Abstract Page Full-Text 7 - Developments in Classical International Law in the Shadow of the Cooperation and Competition of the Great Powers Aboozar Omrani