Bad culture has a simple tell: people assume the worst of each other. Not occasionally. By default. Walk into a company or a country where suspicion is the operating system, and you feel it immediately — the averted eyes, the guarded silences, the invisible tax on every interaction. Nobody says hi. Nobody laughs too loudly. Everyone is quietly guilty until proven innocent.
Flip the script, and the difference is almost embarrassing in its simplicity. Some places — certain offices, certain countries — just greet you. A real hello. A laugh that nobody had to earn. It sounds small. It isn't. That reflex, the instinct to assume a stranger is basically decent, is the entire foundation. Culture isn't the mission statement on the wall. It's what people do when nobody's evaluating them.
The root assumption matters more than any policy, ping-pong table, or town hall ever will. Believe people are mostly stupid or bad, and you'll build systems that treat them that way — surveillance, bureaucracy, low-grade contempt dressed up as process. Believe people are mostly good, and you barely have to build anything. Kindness becomes the default architecture.
One assumption poisons the well. The other one fills it.