What prevents micro evolution from becoming macro evolution

Creationists seem to have focused on "genetic meltdown" and "genetic entropy" lately.Is there any evidence that these actually occur in normal populations?I know that Sanford believes in this, but then he believes in a young earth. The fact that the earth is old completely changes the dynamics of his argument, and not for the better.None of the other explanations creationists have put forth over the years have withstood the tests of science, and I suspect this one is no different.Given that, there seems to be no barrier to a lot of micro-evolutionary events adding up over time to a macro.

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Religious belief does not constitute scientific evidence, nor does it convey scientific knowledge.

If I am reading that correctly, there is a mechanism that limits the effects of genetic entropy?Is that how you read it?

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Religious belief does not constitute scientific evidence, nor does it convey scientific knowledge.

Thanks, that's what I thought it said.That confirms the results we see in the real world, where there are several billion years of evolution without this "genetic entropy" causing it all to go extinct.This also supports my idea that you have to believe in a young earth and "the fall" to support the kind of genetic entropy that creationists are pushing.

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Religious belief does not constitute scientific evidence, nor does it convey scientific knowledge.