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But now, with Trump turning American economic power against friend and foe alike, we risk sliding into something closer to autarky, a world where the U.S. stands alone, detached from any coherent bloc.

"Strategic autonomy doesn't mean autarky," Macron said after the speech at the embassy.

But what about the case for autarky in things beyond food and energy?

“Russia, while our Western friends literally dream of this, will never take the path of isolation and autarky,” Mr. Putin said.

But this kind of autarky has a price -- deepening isolation from the world economy, markets and investment, he noted.