SixAmbregrisRingtale@Hi @Anamandy, I think this book is not as simple as being about 'avoiding words' that could be painful to some. Many dictators start of their campaign promoting 'free speech' and 'free thinking' (encouraging people to even insult others, thinking that that is what freedom is all about) and then, when gaining power, they will ban journalists, punish people that are against their government and so on to stay in power. It's when 'free speech' becomes just 'one way trafic' when it stops being about real freedom and I think this book is more about that than about being conscious of what ones words can do to others.
For me personally, avoiding words that could hurt others is part of my freedom (!) to consult my own conscience before I speak and not to be 'prisoned' by the idea that we all 'must' say whatever we want, not matter the impact.
Incidentally, and stepping a bit aside for a sec but still on-topic: it is scientifically established, time and again, that language influences perceptions, thoughts and representations of the world - random example, "fireman" will, unconsciously, make little girls integrate - not even "think" - that it is "not for them"; while "firefighter" won't have that effect.
Language doesn't exist in a vacuum, outside of time, place, culture, you name it; it is very much contextual, has connotations, and it does evolve, with society and/or preceding it. It's all but "censorship" to move away from words that have a connotation/weight that has become socially/culturally undesirable in place P and time T. The example has already been given above, but here and now, using the N- word would be totally not OK. I guess that when that shift started, some people felt censored and silenced too.
I'm giving this example not to start any political subject by the way, but only to illustrate how intention matters as well.