The Socialist Universe
Capitalism works through a disparate group of businessmen, each acting in their own interest. There is no central plan, each businessman tries out different ideas, the successful businesses grow and thrive, the bad ideas result in businesses. The result is development and growth.
Communism doesn't accept that this is plausible and instead beleive that a system as complex as a modern economy must be planned ie designed by a single authority. Communist economies are inevitably less successful than capitalist ones by any standard you care to employ.
When dealing witht he Christian Right this may have some persuasive power. After all if you beleive in free market capitalism you have to beleive in emergent complexity, whether you realise it or not.
Of course, everyone but the hardest-core Randroids will admit that every capitalist society can and should, like the universe, function within a system of constraints, which is to say socialism of a greater or lesser degree. If pure Communism is a "command economy," and laissez-faire capitalism is an "at-will economy," then you could phrase the happy medium as a "suggest economy." As Richard Dawkins put it, "Life is the result of the non-random replication of randomly varying replicators." The fixed rules which govern the functioning of these myriad and random replicators are exactly and precisely analogous to the sort of regulatory constraints you find in a working capitalist society -- occupational health and safety laws, tax codes, environmental regulations, service levies, the availability of resources and infrastructure (everything from sanitation and electricity to the labour pool and client base); all of these things are the non-random governing principles in which the myriad and random complexity of the marketplace function. Which also explains why some species of businesses thrive in certain environments, and the same species of business will die (go out of business) in others.
Without a functioning system of constraints creating an orderly and healthy system in which business can grow and thrive, what you wind up with (that is to say, pure laisssez-faire capitalism) looks an awful lot like, oh, say, Somalia for the last decade or so. If you really want to live like that, be my guest, but include me out.