"In fact, Putin embodies war ... He will not change ... We must change. We all must change to the extent that the madness that resides in this man's head or any other aggressor's head will not prevail," Zelenskiy said.
Nearly two years after Russia launched its full-scale invasion, Zelenskiy told the forum he strongly opposed freezing the conflict along its current lines.
The forum comes as Kyiv's troops are going onto a more defensive footing after a major counteroffensive last year was unable to break through Russian defensive lines in Ukraine's occupied south and east.
