The top educators in both Canada and USA have waged a relentless war against Flesch. His crime: being correct about reading. Their crime: being comfortable with illiteracy.
Rudolf Flesch wrote two famous books, "Why Johnny Can’t Read" (1955) and "Why Johnny STILL Can’t Read" (1981). I read both books twice, years apart, and had the sense that Flesch was intelligent, brave, and honorable. (You can find my book reviews on Amazon.)