Social Darwinism and World War I

[Method]

That would be your third strike. What exists today -- call it Darwinism, Neo-Darwinism, Modern Synthesis, Evolution Theory, or any other name that suits your fancy -- is all "Darwinism" in the sense that it is founded squarely upon the foundational Darwinian Principal of descent with modification and the survival of privileged/favored species. Heck, it's there in black and white in the title of Darwin's book: "On the Origin of Species by Means of Natural Selection or The Preservation of Favoured Races in the Struggle for Life". It is THAT foundational Principle that serves as direct, logical and scientific justification for the previously-listed atrocities. Evolution is "science" - isn't that what is promoted everywhere?

How do you justify an Ought with an Is?

Again, you are trying to justify the genocide of people who carry Ebola with the observation that people with Ebola die. That makes no sense. You can't derive a moral directive from how nature is currently operating. Our morality is defined by how we want the world to be in the future, not how it is at the moment. We don't throw fat people from tall buildings because heavier objects have more gravitational force according to the edicts of Social Newtonism.

Nowhere in the theory of evolution does it say that we ought to prevent those we deem less fit from having children. NOWHERE.