Examining the Three Existential Threats of the 21st Century: Artificial Intelligence, Climate Change, and Nuclear Weapons

The authors critically examine three existential threats facing humanity in the 21st century: advanced artificial intelligence, escalating climate change, and nuclear weapons. Drawing on scientific consensus and growing institutional concern, they explore the structural features that make each threat existential and analyze their dangerous interactions. The authors propose a framework for future inquiry, policy, and action, emphasizing the urgent need for integrated global governance models. They argue that only a holistic, interdisciplinary, and cooperative approach can secure the survival and flourishing of humanity.