[[“survival of the fittest?” I know what you mean but the phrase is a tautology, it explains nothing, proves nothing, such is evolution]]
They mean it to mean macroevolution, but survival of the fittest is actual a microevolution concept- not macro- in macro- one species is supposed to evolve into a completely different species- something that has never been proven- in microevolution, a scientific fact, species adapt to their environments, and the fittest pass along their genes to the next generation and so on and so forth until the fittest thrive (an example would be hummingbirds on an island whose beaks are longer and longer as time goes on because the flowers on the island have deeper and deeper nectar- those with shorter beaks will die off while the birds with longer ones will be able to get at nectar and survive and pass along their genes- this is microevolution, (survival of the fittest) but it is NOT macroevolution- a scientific impossibility- The hummingbird remains a humming bird and isn’t passing along non species specific genes, which would be an absolute necessity IF macroevolution were to happen- NO new non species specific information is being passed along- but that is an issue for another thread