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Comment Coincidence or a factor? (Score 4, Interesting) 334

The fact that we are in a small galactic cluster, per typical cluster, suggests its small size has protected us from being visited or invaded. If we had evolved in a medium or large cluster, the most likely case otherwise due to density, then perhaps we'd have encountered ET's by now. ET's are less likely to visit & colonize sparse clusters because it's too far to travel for too few resources.

Copernican Principle and Anthropic Principle would suggest that some factor is involved to "keep us out" of denser clusters, where probability would otherwise place us. The boondocks are protecting us. Nobody is bothering us because we are stellar rednecks hidden in the difficult-to-reach woods.

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