My husband and I got into a fight. He yelled at me, I yelled back at him. And then, silence. For a full day. When we started speaking again, we didn’t talk about why we were mad at each other. Just swept it under the marital rug. To anyone else, we didn’t look or act like we were still seething inside. But we were. I’ve been thinking a lot about unity. That’s what everyone wants, right? But what is it, and what’s the best and fastest way to get it? As it so often does, history may provide an answer.