What was Darwin’s perspective on the idea of irreducible complexity, gaps in the fossil record and beautiful animals like the peacock?

http://www.asa3.org/evolution/irred_compl.html

Darwin did not have all the answers as scientists today do not either. He was puzzled by complex organs like the eye. He was unaware of genetics completely. Even so from his perspecive, he felt there was a natural explaination. As it turns out it seems he was quite right.

http://www.uwgb.edu/dutchs/PSEUDOSC/IntelDesign.HTM