Bernie Sanders’s 2016 presidential campaign may be the most consequential failed bid for the presidency in American history. Sanders didn’t just show that unapologetic leftism could be popular with the voting public, particularly at a time when inequality is worse than during the Gilded Age. He also transgressed numerous political orthodoxies, from consistently laying America’s problems at the feet of “millionaires and billionaires” to unapologetically calling for government programs to support ordinary Americans, expanding the public’s view of not just what was politically possible, but what was desirable.

But Sanders fell short on one key element of his platform: foreign policy.

Bernie did make a few breaks with establishment thinking on foreign policy, of course. He pilloried Hillary Clinton over her friendship with America’s foremost ghoul Henry Kissinger, who is usually a prized get for any candidate wanting to beef up their credentials. He repeatedly criticized US military adventures, such as in Iraq and Libya. He defended Palestinians’ rights, criticized Israel’s treatment of Gaza, and suggested the United States take a more balanced approach to the region instead of reflexively defending Israel.