Malthus: if life can expand, it does. Civilizations too? Search for Malthusian galaxies: http://unenumerated.blogspot.co.uk/2010/02/interstellar-archaeology-and-surface.html … & http://scienceblogs.com/catdynamics/2012/10/05/new-frontiers-in-astronomy-cosmic-abundance-of-kardashevs/#comment-7097 …
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@nickszabo4 I find Kardashev scale to be a very "industrial"-era outlook on civilization progress.
@simondlr Per Malthus, replicators expand whenever they can: industrial revolution-like epochs enable them to (temporarily) expand further.
