Teleological arguments for the universe are getting so compelling that many atheists are resorting to the “multiverse” theory.
They realize that the spectacular fine-tuning of the universe implies a designer, so they posit that there must be an infinite number of universes, with ours just happening to be one which supports life.
They have zero evidence for this, of course, and don’t seem to realize that explaining the existence of an infinite number of universes is harder than explaining one. They seem kinda desperate to me. It is a true “science of the gaps” play.
In short, I view the multiverse theory as an atheist’s concession speech.
Wintery Knight has a thorough post on this as well.