After two days of talks in London, China and the U.S. announced the outlines of an agreement to honor a deal they agreed to last month in Geneva.

Trump’s trade war won’t just cripple domestic markets—it will slow global GDP growth to its lowest point in 17 years. The World Bank’s Global Economic Prospects report found that “international discord” surrounding trade has “upended many of the policy certainties that helped shrink extreme poverty and expand prosperity after the end of World War II.