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Thanks for the correction. The upshot, however, is that few empires last as long as 500 years, and only a couple lasted as long as 1,500 years. And those empi

Thanks for the correction. The upshot, however, is that few empires last as long as 500 years, and only a couple lasted as long as 1,500 years. And those empires change a lot over the course of their existence; they weren't effective vehicles for a collective effort at, say, colonising Mars.

KineticLensman 3y ago
> And those empires change a lot over the course of their existence; they weren't effective vehicles for a collective effort at, say, colonising Mars Completely agree!