You're not being descriptive. You're trying to equate a positive body of theory (Darwinian evolution) as necessarily implying a syncretic, normative body of the

You're not being descriptive. You're trying to equate a positive body of theory (Darwinian evolution) as necessarily implying a syncretic, normative body of theory (Social Darwinism, which varies from laissez-faire to collectivist interpretations, largely because most of it has scantly to do with actual Darwinism). In other words, you're committing a naturalistic fallacy. It should also be noted that much of "Social Darwinism" is actually quite old, going back to Plato's endorsement of selective, rationed breeding in The Republic.