"My biggest concern for the future of this world is not so much that the United States moves away from its alliance network, it's that once the United States completely economically isolated, which we are very close to now, flips. And instead of guaranteeing global commerce, we're willing to mess with it to achieve this or that goal."

"We need to start thinking of what happens when the United States is no longer the guarantor of order, and instead becomes an agent of disorder. Because I don't think we're that far off."