I, too, would be hacked off to no end if I were backward and intellectually challenged.
Sorry. That straight line was sitting around and no one was using it. I hate to see a wasted straight line.
Actually, for a theory posited in 1859 when the author (and the rest of the world) was unaware of the reality of genetics, it has stood the test of time quite well, later embracing genetics (which only strengthened its position), and either embracing (and being strengthened by) or defeating every single scientific challenge it has faced in 145 years.
It is not “politically incorrect” to challenge the Theory of Natural Selection, rather it is, currently, scientifically incorrect to suggest that it is in error until such time as someone presents a legitimate alternative (which, as noted, no one in 145 years of trying has succeeded in doing). Instead, we get religious mythology covered with “equal time” arguments or we get demonstrations of the failure of imagination in god-of-the-gaps logic errors such as Intelligent Design.
Personally, I think that the theories of flight are all flawed constructions and that we should be teaching the principles of overcoming Static Gravity in our courses on aeronautical engineering. Equal time for alternative theories, right?