The administration of US President Donald Trump has warned that Europe faces the "disappearance of civilization" and has questioned whether some states can remain reliable allies, says a new document that pays attention to the continent.
The 33-page National Security Strategy contains the US president's vision for the world and how he will use US military and economic power to work towards it, the BBC reported.
Trump has described the document as a "roadmap" to ensuring that America remains "the best and most successful in human history."
European politicians reacted immediately, with German Foreign Minister Johann Wadephul saying his country did not need "foreign advice".
A National Security Strategy is typically issued by presidents once a term. It can provide a framework for future policies and budgets, as well as signal to the world where the president's priorities lie.
The new document has similar rhetoric to Trump's speech at the United Nations this year, where he harshly criticized Western Europe and its approach to migration.
The new report reinforces Trump's view, calling for restoring "Western identity," combating foreign influence, halting mass migration, and focusing on U.S. priorities, such as stopping drug cartels.
Focusing on Europe, it states that if current trends continue the continent would become "unrecognizable within 20 years or less" and its economic issues "are obscured by the real future of the disappearance of civilization."
"It is not clear whether some European states will have economies and militaries strong enough to remain reliable allies," the document says.
It also accuses the European Union and "other transnational bodies" of carrying out activities that "undermine political freedom and sovereignty," and says that migration policies are "causing conflicts."
Referring to the Russian invasion of Ukraine, the document says that Europe lacks "self-confidence" in its relationship with Russia.
Managing European relations with Russia will require significant US involvement, the document says.