The biggest road block to building a sustainable society is that we have to make changes to the well and truly entrenched non-sustainable society we already hav

The biggest road block to building a sustainable society is that we have to make changes to the well and truly entrenched non-sustainable society we already have. If you were starting fresh on a new planet that doesn't have instantaneous communications or easy travel options with Earth, it would be a lot easier to build a fundamentally different society. Moving off Earth might actually be the easiest way to achieve what you're talking about.