The problem of abiogenesis is a fascinating one. The unlikeliness of DNA/RNA--an enormously complicated molecule, but such a self-reproducing molecule is needed for any life and evolution to take place--is a stumbling block for many, and caused longtime atheist Anthony Flew to consider a Creator the most likely answer towards the end of his life. Many of the explanations given--self-reproducing crystals in clay, for instance, as precursors to DNA--are dubious at best.
Here one is sorely tempted to attribute the miraculous to the mysterious. I personally don't, although I can understand the temptation.
However, the fact that amino acids are found in nebulae argues that, in effect, the field of possible chemical laboratories is much wider than the earth---in fact, universe-wide. Such a huge number of "laboratories" makes the odds much more respectable. That, combined with the self-organizing properties of some amino acids, makes me doubt anything miraculous---in need of direct, divine intervention-- in the origin of DNA/RNA.
However, Dawkins' argument that God is the "ultimate 747" is flawed---not on the complexity side, but on two counts: first, the need for an infinite regress of divine Designers for other Designers. If the Originating Inelligence created space-time, then He/She/It's no more in need of further sequence than Hawking/Hartle's four spatial dimensions that (somewhow--without sequence!) became three spatial dimensions and one time dimension. It's just in this case the original "condition" would be intelligent and complex. (Question: could no-time, instead of having literally no sequence, instead mean that an eternity of happenings--thoughts, plans, etc. happen in literally no time? Or was it just emerge as that complex? Either way would have this intial comlexity.)
Secondly, Dawkins--I'm not sure deliberately, or if he missed it, as did most of his critics--made an invalid comparison. A multiverse of at least a sextillion sextillion "universes" is much more complex, by any reasonable standard of complexity, than a single universe and a Creator, who admittedly must have a model of the complex universe in His/Her/Its mind...just as a pair of animals (say, a mother and its child, or maybe a beaver and its dam might be a better comparison) are much less complex than a million-animal biosphere. A Creator only adds to the complexity more than the multiverse itself if you take the multiverse, not a single universe, as a given.
Interesting philosophical slight of hand. You can read Dawkins' thoughts from THE GOD DELUSION here and judge for yourself.
Next time: THE PROBLEM OF EVIL (PROLOGUE)