One more war that should never have been started.

The global war on drugs has failed and governments should explore legalizing marijuana and other controlled substances, according to a commission that includes former heads of state, a former U.N. secretary-general and a business mogul.

A new report by the Global Commission on Drug Policy argues that the decades-old worldwide “war on drugs has failed, with devastating consequences for individuals and societies around the world.” The 24-page paper was released Thursday.

“Political leaders and public figures should have the courage to articulate publicly what many of them acknowledge privately: that the evidence overwhelmingly demonstrates that repressive strategies will not solve the drug problem, and that the war on drugs has not, and cannot, be won,” the report said.

The 19-member commission includes former U.N. Secretary-General Kofi Annan and former U.S. official George P. Schultz, who held cabinet posts under U.S. Presidents Ronald Reagan and Richard Nixon.