Paris - The head of the United Nations is warning that the world today has several of the ingredients that led to the failure of the peace that followed World War I.

U.N. Secretary-General Antonio Guterres noted trade conflicts, increasingly polarized politics, and the failure to solve inequalities exposed by the 2008 world financial crisis.

He expressed particular concern about the “crisis of confidence” in the European Union, calling the bloc forged from the ashes of World War II a project “too meaningful to fail.”

He acknowledged problems at the U.N. but stressed its importance to averting a world war for the past 73 years.

Guterres also cautioned about a “weakening of the spirit of compromise that underpins democracies, an indifference to collective rules.”

He spoke with world leaders at a peace forum in Paris on Sunday, 100 years after the armistice that ended WWI. U.S. President Donald Trump, who has expressed disdain for multilateral organizations, skipped the event.