"Survival of the fittest" is a sliding cut off criterion. It would be more accurate to call it "survival of the fit enough" or "non-survival of the least fit". During good times many survive who would not in rougher times. When the bad times come, nature weeds the culls ruthlessly and emotionlessly. For all of its good points, our current technological civilization is a house of cards that could be blown away by a major catastrophe. A very simple example: Without my glasses, I am legally blind (extreme myopia). Post-catastrophe, a person like me would be helpless and defenseless. Diabetics need insulin (a product of technology) to survive. The list goes on and on.

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Any day you wake up on "the right side of the dirt" is a good day.

T. Anderson