No, authoritarianism has lead to mass famine and death. Marxism is just a way to operate an economy. If you implement changes to an economy by force, you’re probably going to hurt people. But we can still make voluntary changes to our world based on things we think are a good idea. Like advocating for and participating in worker cooperatives.

And being a purely voluntary concept I’m suggesting, you don’t really need “a country” to do this. You could have just some groups within a country do this and they would see some benefits.