In education, we spend enormous energy designing initiatives to build belonging. We create assemblies, advisory curricula, posters, slogans, and protocols. We train, retrain, and sometimes overtrain. All of this work is well-intentioned. Much of it is necessary. But somewhere along the way, we began to overlook where culture actually lives. Not in binders. Not in slide decks. Not even in programs. Culture is built in the margins of the day—in the moments between the moments—where adults have discretion, where choices are unscripted, and where students decide, often unconsciously, whether they are safe, seen, and valued.