My feelings about this book are mixed.
One thing he mentioned midway through and left hanging was quite baffling to me.
He first mentioned the reality that humans cannot live without killing other life forms. Even if a vegan, still, plant life must die for a human to live.
He then mentions how culture has divided lower and higher forms of life. We tend to consider it okay to pluck and eat a dandelion or kill a cockroach, since they are lower forms of life, but dismembering our baby would be another matter.
It would seem he is a philosophical naturalist, and he thus asserts there is absolutely no such thing as higher and lower forms of life. Literally nothing distinguishes humans from any other life; the baby has no more value than the roach, and to consider a person has a higher form of life than the spinach in the garden is a dangerous illusion.
He wrote as if the idea of saying some life has more value than other life is at the heart of dehumanization.
Uhh... okay... but then to move on!?
The obvious implications of his chain of thought are quite ironic.
As humans are driven to live, they will kill. In light of this fact, how can Smith think he is helping anything, by saying the baby has absolutely no more worth than the ant, termite, or mosquito that we kill without a second thought? Not only that, but he implies that a human being has no more value than the carrot that we peel, cut up, and toss in the boiling water.
Well, gee... if that is the case, why not just peel and chop up David Livingstone Smith and toss him in a pot? He literally said there is no difference--literally nothing that distinguishes him from the slime mold and the maggots, the cauliflower and the Brussel sprouts.
And this, in a book on dehumanization?
That is truly a bizarre point for him to just leave hanging, when it has dehumanizing implications.
I get how the idea of hierarchies of value can be problematic--leading to things like the Caste system in India. But you cannot just do away with the distinctions. We cannot live if we consider the plants, insects, and pests as having equal value as humans, and it will not be pretty if we consider humans as being of no more worth than tapeworms and sand burs.
It seems the biblical idea that all humanity is made in God's image and has equal value is an important start. It seems that distinguishing conscious life from unconscious life is the next step. The author rejects this and yet provides nothing in its place.
My next quibble was that while I do appreciate that Smith does not continually overgeneralize and characterize all white people are irredeemably racist, privileged and evil, and he does not directly say that bad people are always and only white, and he doesn't constantly use the word "white" as a pejorative, like other woke white progressives do; still several examples of dehumanizers are striaght white and able males who brutally torture, dismember, and burn people of color. If a book primarily included examples of black people who dehumanized and tortured white folk, Smith would definitely flag this as racist and an attempt to dehumanize black folk.
Anyhow, I still appreciate that he does encourage people not to dehumanize the dehumanizers. Smith's woke contemporaries will be angry to read this (I have found one such review that wasn't pleased). For woke Progressives, the only way to fight dehumanization and racism (which is done by white males) is to dehumanize white males and suggest they are all inherently racist. Not to dehumanize white males would surely be to give MEGA a free pass. And gasp... how could Smith not have attempted to dehumanize Zionists? I saw another reviewer who was unhappy with this. How could he not have included example after example of people from Israel dehumanizing Palastinians, as grounds to say Israel has no right to exist and to proclaim "from the river to the sea!"