Seems fairly clear that you fix a breed by LIMITING the amount of alien infiltration. You make a race by homogeneity and by avoiding in breeding, No argument has ever been sprouted against it. You like it in dogs and horses.
Bureaucrats are a pox. They are supposed to be necessary. Certain chemicals in the body are supposed to be necessary to life, but cause death the moment they increase beyond a suitable limit.
No good poetry is ever written in a manner twenty years old, for to write in such a manner shows conclusively that the writer thinks from books, convention and cliché, not from real life.
