Part of the truth of a theorey is in its effect of people and how they behave. Evolution was used by Nazi's to justify what they did. I believe we can all agree that social darwinism is false, no matter if evolution is true or not, a government has no right to decide who is fit to survive or not survive.
If you look at the Torah, the Hebrews were not "fit to survive." Even Moses under inspiration of God said that "I did not choose you because your were the mightiest people, or the greatest people, or even the most intelligent people, in fact you are the weakest, smallest people." (That is paraphrased.) In fact the Hebrews survived these several thousands years against all odds. Which shows that survival of the fittest doesn't hold water.
The Creation Museam of Kentucky creates more jobs for Kentucky and pays more federal tax to keep the Feds afloat than all evolutionists combined ever had.
Look at the story of Abraham, his wife was barren and it is probably closer to the truth that he himself was impotent. If survival of the fittest were true, Abraham beat all odds.
No, there is no survival of the fittest. It just doesn't hold water.