Certainly a complex *design* needs a designer. This is the old problem with explaining evolution to people; they cant grasp that organisms arent "designed". That is to say, the present state of an organism is NOT an inevitable one--it could have just as easily turned out differently. The fact that it does exist however discounts the improbability of it existing. Think about this.

This is perhaps the most fundamental change in thinking that is needed before any meaningful debate about life origins can take place. Otherwise, its all basically a question of observing something so complex that one is likely to assume it cant possibly have developed without an intelligent designer.

In fact, an organism is complex but not irreducibly so. All organs are made of cells, which are made of organelles and membranes, those are made of proteins and so on, etc. The fact that they function in complex systems is the result of many small incremental changes--as hard as it may be to believe.