Like 3.7 or 3.6 stars, I'd say. I would round it up to 4, but it wouldn't feel right.
So, this was definitely a good book, and it was insightful, and I learned new information, and it made me think about some interesting things. But:
-The writing style kind of felt...condescending. To me, personally.
-There were a lot of opinions in this book, it seemed like, and there were some I personally didn't agree with, and yes, it did cause me a lot of dis-ease. It was also just rather annoying.
-This isn't a big issue, but it was super similar to the author's previous book, Plato, Not Prozac, which I read, and so it felt a little...unoriginal, kind of? (To be honest, I would like this book more than Plato, Not Prozac if the writing style didn't feel more condescending and if I didn't have qualms with some of the author's opinions. This one was definitely more interesting.)
One thing I really loved was all the references to renowned philosophers and intellectuals, because a lot of that is stuff I don't know, and it's super helpful.
So, anyway, you might like this book, you might not. Either way, it's likely it'll be helpful and at least slightly interesting, if you read it.