Teoria da Evolução por Darwin: Os Principais Postulados

Darwin’s On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life, made several points that had major impact on nineteenth-century thought:

1. That biological types or species do not have a fixed, static existence but exist in permanent states of change and flux;

2 . that all life, biologically considered, takes the form of a struggle to exist — more exactly, to exist and produce the greatest number of offspring;

3 .that this struggle for existence culls out those organisms less well adapted to any particular ecology and allows those better adapted to flourish — a process called Natural Selection;

4. that natural selection, development, and evolution requires enormously long periods of time, so long, in fact, that the everyday experience of human beings provides them with no ability to interpret such histories;

5. that the genetic variations ultimately producing increased survivability are random

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