The world was standing at the crossroads in 2015 as globalization propelled human beings into an increasingly integrated community of common destiny. In the meantime, the world witnessed the strategic competition among major powers. This annual publication offers views, opinions and predictions on global political and security issues, and China's strategic choices by Chinese scholars. It covers almost all the significant issues that took place in the international security arena in 2015. Besides the relations among major powers, it studies the international community's fight against Islamic State (IS), the strategic situation in the Korean Peninsula, political situation in Myanmar, the Joint Comprehensive Plan of Action on the Iranian nuclear issue, free navigation in the South China Sea, China's Belt and Road Initiative and its grand diplomacy.This book argues that the strategic competition among major powers is heightening, and smaller countries as well as extremist forces like the IS are seeking strategic space by taking advantage of the conflicts among major powers. The book concludes that to address this major historic challenge in international politics, it is essential that some major powers drop the hostile stance towards each other and enhance partnership to foster international cooperation.