here is what might be called a short story by mark twain, and i've never seen it but i leave it to you for your 'edification';


I have been studying the traits and dispositions of the lower animals (so-called), and contrasting them with the traits and dispositions of man. I find the result humiliating to me. For it obliges me to renounce my allegiance to the Darwinian theory of the Ascent of Man from the Lower Animals; since it now seems plain to me that the theory ought to be vacated in favor of a new and truer one, this new and truer one to be named the Descent of Man from the Higher Animals. 
In proceeding toward this unpleasant conclusion I have not guessed or speculated or conjectured, but have used what is com­monly called the scientific method. That is to say, I have sub­jected every postulate that presented itself to the crucial test of actual experiment, and have adopted it or rejected it according to the result. Thus I verified and established each step of my course in its turn before advancing to the next. These experiments were made in the London Zoological Gardens, and covered many months of painstaking and fatiguing work.
Before particularizing any of the experiments, I wish to state one or two things which seem to more properly belong in this place than further along. This, in the interest of clearness. The massed experiments established to my satisfaction certain gener­alizations, to wit:
1. That the human race is of one distinct species. It exhibits slight variations (in color, stature, mental caliber, and so on) due to climate, environment, and so forth; but it is a species by itself, and not to be confounded with any other.
2. That the quadrupeds are a distinct family, also. This fam­ily exhibits variations (in color, size, food preferences, and so on; but it is a family by itself)..........https://fromthetrenchesworldreport.com/the-damned-human-race-by-mark-twain/243074