This is like such a cliché I wonder if you're even serious, but there are people right now proving that's possible. If you keep consensus-based decision-making at the center of your society, it can build the power to defend itself without allowing the space for any tyranny, even the most mundane. You do this by working at it in your every day life and knowing what you're fighting and why. Learn about Rojava, Myanmar, and indigenous resistance in Mexico since the 90s, but also like talk to any anarchists IRL.