I think there are many details to be disagreed with in this book, but I'm sold on the over arching argument of the necessity to think the future carefully.

I'm new to the topic of longtermism and found it a sold introduction to the subject.

As other reviews have pointed out there are many flaws. Explanations can some times feel a bit rushed or that things are brushed over. Topics that you would have like to seen included are merely hinted at, while other topics that seem less important are more fully developed.

I found some of the conclusions disagreeable - particularly when talking about the lost ecosystems and biodiversity being an acceptable consequence of human expansion. (Although, to be fair, in these cases the arguments are well developed and the author is careful state that moral / ethical views of such arguments are far from being agreed.)

The last section "Taking Action" is less developed that I would have liked. It consists of just one chapter and feels more like an acknowledgement that there are a lot of things that one could do to help future generations.

Still despite it flaws, I think this book still deserves the five star rating I've given it. Any introductory text needs to make choices and that the reading isn't always going to agree with. There is much that I found thought provoking and many references to other texts for further reading, if you wish to dig deeper.

If you are someone that would like to improve the world for current and future generations and are looking for an introductory text, then I think this is a good place to start.