By following the lead of Richard Dawkins, we realize that random variations coupled with natural selection can function as a designer-mimic – the blind watchmaker. But as I have noted earlier, all designers are constrained (and thus, in a way, guided) by their design material.
When we survey the living world today, it would be unjustified to assume that the blind watchmaker could craft a world of similarly complex and integrated creatures without proteins for the simple reason that the living world today is a protein-dependent reality. Without the use of proteins as design material, it is not clear what the designer-mimic could actually design.
But what if we moved up the ladder of complexity and considered the two basic cell designs – prokaryotic and eukaryotic.