Being a recent college graduate, the moment I saw that Bill Gates had recommended this book, I bought it and began reading. This book has some important, intriguing, and profound themes such as how far we have come collectively as humans from even the middle ages to now. Though we are by no means close to being angels, (as evident by the chapter about our inner demons), progress is undeniable. I also am a fan of Pinker's style of writing. He adds humor intermittently, has some interesting anecdotes, and does a good job at explaining most of his reasoning and data. I found the length of this book to be excessive though. This is a big book, make no mistake about it. At times, when Pinker is backing up his claims with copious amounts of data and graphs in the middle sections of the book, it can be a chore to read. However, I think I am the better for having read this book, and though I personally would not say that this book changed my life, I am glad to have read it.
I would also like to mention that if you buy the paperback version, towards the beginning, the text on the pages is uniformly at an angle, and not entirely horizontal across the page.