Natural selection doesn't make things "better"

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We often have the same intuitive misconception when we think about evolution. Natural selection doesn’t make things “better”—it just optimizes biology to best survive in whatever environmental circumstances it finds itself. When something in that environment changes—a predator mutates and becomes faster, a certain type of food becomes scarce, an ice age rolls in—it means species that were previously optimized to the environment no longer are. The environmental change alters the natural selection criteria, which applies a pressure on the species as it is, and over time, the genetics of the species will react to the pressure by changing in order to optimize to the new environment.

Link:: The Elon Musk Blog Series

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