One remarkable development it anticipates is a spreading affluence that leads to a larger global middle class that is better educated and has wider access to health care and communications technologies like the Internet and smartphones. “The growth of the global middle class constitutes a tectonic shift,” the study says, adding that billions of people will gain new individual power as they climb out of poverty. “For the first time, a majority of the world’s population will not be impoverished, and the middle classes will be the most important social and economic sector in the vast majority of countries around the world.”

At the same time, it warns, half of the world’s population will probably be living in areas that suffer from severe shortages of fresh water, meaning that management of natural resources will be a crucial component of global national security efforts.

The study also warns of the risk that terrorists could mount a computer-network attack in which the casualties would be measured not by the hundreds or thousands killed but by the millions severely affected by damaged infrastructure, like electrical grids being taken down.

At least 15 countries are “at high risk of state failure” by 2030, the report predicts, among them Afghanistan and Pakistan, but also Burundi, Rwanda, Somalia, Uganda and Yemen.

The study acknowledges that the future “is malleable,” and it lists important “game changers” that will most influence the global scene through 2030: a crisis-prone world economy, shortcomings in governance, conflicts within states and between them, the impact of new technologies and whether the United States can “work with new partners to reinvent the international system.”