Lisa Simpson had the right idea. In a 2002 episode of The Simpsons, the elementary school student tries to impress two college kids by putting a sticker on her bike that says “US Out of Everywhere.”

It is a slogan that should be ubiquitous on the Left. With the string of disastrous military interventions across the world in recent years, it’s even more apparent that US crimes aren’t isolated — there’s an underlying structure that produces them.

Tackling that underlying structure, though daunting, also fosters opportunities for unity. Because of the sheer destructiveness of US militarism, and its vital role in maintaining global capitalism, a reinvigorated antiwar movement could bring together leftists with a broad range of concerns.