I like Murray Bookchin. A Marxist with credentials who saw beyond scarcity politics. Something has to happen to get us there and that's either fusion, space, or resource exploitation of the global south as has fueled every other age since colonialism developed. If we can exploit resources in space, that's less of a burden of resources on Earth. The living space you could create in orbital habitats with orbital factories is so vast that there wouldn't need to be such a focus on development here. It opens new scales for exploitation but we're already damned if we continue to do what we're doing and renewable energy will only get us so far into decarbonised industry. At least it's something that reduces the damage we do in the human-nature dialectic even if we're stuck with the same struggle that would probably evolve anyway as it always has.