Are Mutations beneficial?

Even mutations fail evolution. Mutations are changes in the genetic 
material and produce new inheritable characteristics in the organism. 
The vast majority of the small ones are harmful; the big ones are 
crippling or lethal. They are believed to contribute to the degeneration 
of organisms and are responsible for many diseases and malformations. 
Nevertheless, evolutionists place hope in them as mechanisms of 
evolution. But they are found to be inadequate to produce new family 
kinds. Evolutionist Bengelsdorf said: “Mutations, involving base changes 
in genes, can account for differences between two men . . . But, for 
various reasons, they cannot account for overall evolution—why there are 
fish, reptiles, birds, and mammals.”