Modern textbooks do little to educate anyone, as they are written to show how smart the author is. not to impart knowledge to the student. The plethora of spelling and gramatical errors (rarely caught by spell checkers or proof readers) indicate that the educational system is failing to produce decent teachers.

By open discussions, and allowing students to read and comment on uncensored, original books, teachers can illustrate, and demonstrate how important it is to remember how far we have come to change our bad habits. I admire folk singers who, (when appropriate for the audience) change swear words or inappropriate verse or chorus; but usually explain (as many do here) the history and intended use of the songs. This not only stimulates group discussion, but enhances an interest in history.

PC behaviour stiffles imagination and clarity, it is an attempt impose restrictions on freedom of expression, by people who only want their version of the world imposed on us all, with or without consent of the majority.