This was first published in 1972. Both Vietnam (or what Holt refers to as the "Asian War") and the segregation of Boston schools are frequently mentioned. If you're squeamish about revisiting those topics, best to stay away.
But the real discomfort is in Holt's critiques of the schools vis a vis race and poverty. The intrinsic promise of the schools is that they will make children into better, productive adults, and that our community/society/country will be better off for it. Holt provides evidence for why that's not possible within his system (and his system is much like the one we have now). Never mind the myriad ways schools have come up with to teach math and reading; for most children, those methods are unnatural, and in many cases interfere with the normal progress they would make if left to do so on their own. How can we expect our children to be creators and critical thinkers if they are taught that deviating from the right answer (or, as may be the case now, the correct method) is considered "disobedience", and that the consequences of that behavior can follow them for the rest of their lives? Certainly, some children are allowed more latitude, but it's not a coincidence that those children also have more flexibility in the rest of their lives as well.
As much as we bemoan how little we understood about the facts of climate change and pollution up until now, Holt spends half a chapter on how the promise of "better employment through schooling" is directly connected to the growth mindset that was ruining the planet in the early 1970s. Might there be a way Holt can see for growth that won't lead to destruction? Yes--but it was dependent on using natural resources, not irreplaceable ones.
While cities and towns across the country have been fighting for more resources to educate its children for decades, Holt bemoaned that education was seen as something that not only had to be so expensive but something that had to be so competitive. Difficult to argue that the real lessons taught by filling some elementary classrooms with state of the art equipment and getting into bidding wars over feted college professors was anything more than Consumerism 101.
For all of his criticisms of schools and the negative aspects of our civilization that they feed, Holt wasn't arguing that schools should be blown up. He understood that some people would *want* to be in schools, and he's open to the probability that some things are better learnt in a system with a prescribed curriculum (e.g., medicine). Let schools exist--but let them be a choice. Let children take classes when and where they want to on whatever subject they want, and let them leave when they're satisfied. (He recommended this a la carte approach not just for K-12 but also for colleges and universities.)
Holt understood that some of what he recommended was harder to implement than, for example, no longer giving grades. It's unfortunate that as of yet many of his recommendations haven't been implemented. However, this wouldn't have surprised Holt at all, who noted that many of the reforms he suggested had been discussed decades before he himself was in school. More depressingly, some reforms had been implemented by the writing of this book, but they had been abandoned before publication. It's for this reason, I believe, that Holt began to lose faith in remaking "the system" and began advocating that people simply leave it.
Recommended for anyone concerned with education.