We remember Sal Cordova fondly:
We believe as things speciate they lose allele variety and inherit more mutations. This shows us clear limitations with evolution, and shows that ancestrally that things were superior than today.
Dollo’s law of irreversibility also shows us that evolution cannot go in reverse, so when they lose this genetic information after speciation, they can never regain it. This is why all horses today are now homozygous and horses in the past were heterozygous. They cannot return to their once superior state allowing for more diversity.
We didn’t realize that people still took Dollo’s Law seriously.