I've heard quite a few people argue that the universe appears designed to support stable complex structures in the same way a bird's wing appears designed for flight...I was interested to see that the recent discovery of gravitational waves lends support to the multiverse hypothesis.

My former supervisor wrote a paper on the idea of cosmological natural selection. Sadly there's not easy way to test if it's true...but, in a totally unscientific way, I really hope it is!