Can you elaborate on this a little bit? I have never read the book mainly because I remember one time in high school, I saw the guy sitting next to me in math class flipping through it.
We had just started the class and we were still trying to figure each other out and befriend each other at the time.
I sort of lost respect for him after seeing him flipping through the book. The title always suggested to me that it was filled with manipulative tactics to get people to do what you want.
No thanks.
It is actually quite funny and old-fashioned because most business examples are coming from the 30's or 40's. ("Mr Smith from the typewriter company...")
Also...what if someone just wants more friends in their life, because they're lonely, and don't really know how to be more personable? A book on winning people over seems like a really useful book to have, if you want to, you know, develop relationships with people and aren't very good at it yet.
You have to be well equipped mentally and somewhat socially to not let things like this bend your head.
Like sales, in a past life I was selling stuff. I did sales for about 9 months before cracking open a sales book. I recognized that I'd learned to do, through blundering around, about 1/5th of what the book was telling me. Reading about that other 4/5ths really opened my eyes. It gave me stuff to think about and work on. It didn't replace experience, but guided it.
Same with a book about making friends, I think, especially for people who didn't make a lot of friends as a kid, but want more in adulthood.
I also haven't read Carnegie (I really need to get to it), but I would expect it to be full of things like that, rather than being a treatise on abstract evolutionary sociology.
I'm not exactly sure what the GP meant, but my take is that if you find the book to be revealing it probably means you were buying into middle-class Christian-Judeo ethics anyway, or are good at faking them. If both parties believe in a win-win solution, then they'll probably find it. So its self-fulfilling in a way. The problem is that is highly competitive environments win-win negotiation is a non-starter and these kind of strategies won't work.
Its something of a relic in my opinion. Maybe it made sense in terms of a door-to-door salesmen like Carnegie was, but I can't imagine it being particularly useful today, especially for those looking to run a tech startup. I'd look at books like "Getting to Yes" or various startup specific books instead as a better use of your time.
It got more popular than that, because the basic premise of the book is that it's a good idea to be genuinely interested in others, and that the best way to get people to like you is to like them. Which is actually fairly insightful.
I'm a basically a leftist bomb throwing communist and I think the book is pretty uncontroversial.
Perhaps contradicted by the study under discussion...
(I understand - and used to subscribe to - the other side as well, that this feels fake, like you're just being manipulative. But that presupposes black & white motives and zero-sum interactions. You can want others to feel good and to do good for them and to do well for yourself all at once, and in most situations there will be no contradiction between all of these. And if there is no external contradiction between them, the only thing that prevents you from making everyone better off is your own psychological hang-ups.)