Kadhafi made the call during talks in Minsk with the authoritarian Belarussian President Alexander Lukashenko, part of his first tour of the former Soviet Union since the Cold War.
"Balance in the world has been destroyed and the world has become unipolar," Kadhafi said during talks with Lukashenko. "The law of force has begun to work in place of the force of law."
"Progressive forces must unite together to correct the mistakes, including those made by the United Nations," Kadhafi said in comments broadcast on Belarussian television.
A former pariah state, Libya has moved into the international fold in recent years by renouncing weapons of mass destruction and taking responsibility for the 1988 airliner bombing over Lockerbie, Scotland that killed 270 people.
Lukashenko, whose regime has been described by Washington as Europe’s last dictatorship, maintained ties with the North African country when it was still regarded as an international outcast.