It seems to me that the fact of common descent is similar. It was widely suspected before Darwin, and is supported by evidence from genetics, embryoloy, anatomy and so forth. Darwin's hypothesis that mutation and natural selection are sufficient to explain the diversity of life may be incomplete, but it's never been falsified by any evidence or experiment.
The above is total bluster, and does not have an iota of proof behind it. Like all evolutionists you make totally broad assertions without anything to back them up. Let's hear the evidence for your statement above.