WASHINGTON (AP) — Nearly two-thirds of the world’s population will live in cities by 2030, with most people middle class, connected by technology, protected by advanced health care and linked by countries that work together, perhaps with the United States and China cooperating to lead the way.

That’s the best case scenario in a report, Global Trends 2030, released Monday by the U.S. government’s National Intelligence Council.

In the worst case scenarios, rising population leads to conflict over water and food, especially in the Mideast and Africa, and the instability contributes to global economic collapse.