Executive summary: Assuming galactic-scale existential risks are real, the author argues that large-scale space expansion may increase long-run catastrophe risk unless we deliberately constrain power, divergence, or abundance, though which “grand plan” is best depends heavily on unresolved physics, moral convergence, and the existence of aliens.
Key points:
The author assigns a roughly 20% to 70% probability that “galactic x-risks” such as vacuum decay, memetic hazards, self-replicating spacecraft, or superluminal travel could destroy a galactic civilisation.
Expanding to many de-correlated star systems may increase long-term existential risk because more independent actors create more opportunities to trigger correlated, galaxy-wide catastrophes.
One strategy is to eliminate “powerful” actors by imposing enforceable resource limits, potentially via a galactic enforcer, strong norms, or embedded oversight infrastructure, though this risks corruption and tension with free will.
Another strategy is to reduce “divergence,” either by limiting the number of independent colonies or ensuring convergent values through shared AI systems or moral convergence, with the threat level depending on whether advanced civilisations converge on moral truths.
A third strategy is to limit “abundance,” for example by restricting expansion, expanding only instrumentally without independent actors, or shifting flourishing into digital worlds insulated from cosmic-scale influence.
The existence of aliens significantly alters the strategic landscape, potentially weakening cautious non-expansion strategies and strengthening the case for rapid expansion to influence galactic governance and manage shared risks.
This comment was auto-generated by the EA Forum Team. Feel free to point out issues with this summary by replying to the comment, andcontact us if you have feedback.
Executive summary: Assuming galactic-scale existential risks are real, the author argues that large-scale space expansion may increase long-run catastrophe risk unless we deliberately constrain power, divergence, or abundance, though which “grand plan” is best depends heavily on unresolved physics, moral convergence, and the existence of aliens.
Key points:
The author assigns a roughly 20% to 70% probability that “galactic x-risks” such as vacuum decay, memetic hazards, self-replicating spacecraft, or superluminal travel could destroy a galactic civilisation.
Expanding to many de-correlated star systems may increase long-term existential risk because more independent actors create more opportunities to trigger correlated, galaxy-wide catastrophes.
One strategy is to eliminate “powerful” actors by imposing enforceable resource limits, potentially via a galactic enforcer, strong norms, or embedded oversight infrastructure, though this risks corruption and tension with free will.
Another strategy is to reduce “divergence,” either by limiting the number of independent colonies or ensuring convergent values through shared AI systems or moral convergence, with the threat level depending on whether advanced civilisations converge on moral truths.
A third strategy is to limit “abundance,” for example by restricting expansion, expanding only instrumentally without independent actors, or shifting flourishing into digital worlds insulated from cosmic-scale influence.
The existence of aliens significantly alters the strategic landscape, potentially weakening cautious non-expansion strategies and strengthening the case for rapid expansion to influence galactic governance and manage shared risks.
This comment was auto-generated by the EA Forum Team. Feel free to point out issues with this summary by replying to the comment, and contact us if you have feedback.