The document outlines several structural challenges to international security, including terrorism, cyberterrorism, nuclear proliferation, China's rise, the crisis in the Middle East, corruption, and climate change. It provides details on each challenge, such as how terrorism is difficult to define but has been an effective tactic, how cyberterrorism allows terrorists to wage war in cyberspace, and how climate change will cause global instability and pressure on resources. The conclusion states that the current rapid rate of change outpaces human and state abilities to cope, putting pressure on nation states and potentially fueling issues like terrorism.