New Delhi, Sept. 25 -- Ukrainian President Volodymyr Zelenskyy told global leaders Wednesday that the world is in "the most destructive arms race in human history" and urged the international community to act against Russia now, asserting that Vladimir Putin wants to expand his war in Europe.

In a bleak view of today's world, he told the annual high-level meeting of the U.N. General Assembly that weak international institutions including the United Nations haven't been able to stop wars in Ukraine, Gaza, Sudan and elsewhere, and international law can't help nations survive.

"Weapons decide who survives," the Ukrainian leader said. "There are no security guarantees except friends and weapons."

Zelenskyy spoke from the podium of the vast...