I’ve come to think of solidarity, this mixture of hope and care, as a physical force or maybe a force field, and as such it invisibly acts on all things that are passing through it at all times. It’s the space between bodies that are marching or singing or striking or otherwise taking action together. Maybe you’ve felt it, at a protest or on a picket line. I’ve heard people say that it feels like church. It’s the way bodies, our bodies, working collectively, change the properties of the space between them. It’s the most important thing.