Well, I don't think being civilized necessitates having lots of able-bodied, able-minded people who are chronically dependent upon the fruits of other . And to say that we either have this or social Darwinism is you once again falling into that false choice we talked about the other day. People aren't plants, Marvin. With relatively few exceptions, they're not completely helpless but for the sustained support from external sources.
Let's get down to brass tacks here: do you view civilization through the Louis Blanc formulation, popularized by Marx, which held that "from each according to his ability, to each according to his need"?
Because it sounds as if you are. And, no, that's not me calling you a communist. I'm simply saying that you seem to believe that, if not for heavily redistributive public policies (which is what Blanc is describing), then we don't have a civilized society....and we thus have Social Darwinism.
And, if that's the case, then you need to realize that if a society is approached in that manner, you're going to surprisingly find a whole lot of "need" that you didn't realize existed. Why is this? Well, because you've (unwittingly, and with the best intentions) established a society where being needy carries a premium.
Here's what you need to consider: to what extent? As much as we have now? More? Is there a certain amount of redistribution whereby we qualify as not being Darwinist?
A common ideal on these questions is FDR's 1944 social vision: a society where every person has a right to employment, housing, healthcare, education -- as well as an income sufficient for food, clothing, and recreation. He put these ideas forward as a "Second Bill of Rights". In other words, I suspect a lot of people would answer the question "to what extent?" by saying "As much as is needed to meet those guarantees."
Now, I think this is utter folly -- and that's not because I desire a society where people are starving and homeless. Rather, I think it's not only unattainable, but also rife with unintended consequences.