[aruanan]

Christianity claims to provide moral guidance ("ought"). Evolutionary biology claims only to provide descriptions of the world ("is"). Thus, failure to induce morally upright behavior is a failure of the former to achieve its claims, but is irrelevant to the latter. Next question?

You've constructed a really pathetic straw man. First of all, there is no such entity as "evolutionary biology" that has any ability to "claim" anything. There are only evolutionary biologists. And these guys, like every other human, are full of "oughts" and "shoulds" that they believe are logical expressions of their belief system which, if followed, would result in the world becoming a better and happier place.

[steve-b]

Irrelevant — the original question was directed to belief systems, not to individual adherents.