Darwinism is an attempt to explain observable reality with only natural forces. The gaps supposedly bridged by Darwinism are as spectacular as a would be bridge over the grand canyon.
The first is the gap from nothing to something. We now know that the universe had a beginning.
The second gap is from atoms to life. There is NO natural explanation for the origin of life.
The third gap is what is known as the Cambrian explosion. Within a very short period of time in earth's history all the prototypes of every species in existence today appeared all at once.
The last gap is between the "highest" of the beasts and human beings.
The only bridge that has any explanatory power at all is supernaturalism. In other words the laws of nature that we observe are simply not sufficient to bridge these gaps. Something that supercedes or can intervene in these laws must have been responsible. I believe that whoever or whatever was responsible for establishing these laws to begin with is the responsible party.