Reviews

Numbers Don't Lie: 71 Things You Need to Know About the World by Vaclav Smil

skoochagian's review against another edition

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4.0

I enjoyed the premise of the book and all the topics it covered. I feel like I learned a lot! I think what I liked most was the fact that the chapters were small enough that it was easy to read. The topics and writing style made me look things up while I was reading because I wanted to learn more. If it weren’t for reading two other books while reading this I would’ve gone through it faster, and I think the fact it took me this long to read made me a little tired of the book by the time I got to the end. Hoping to read more of this author soon!

leeuhhhh's review

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2.0

there were some interesting parts, but not enough for me to give it a high rating. 71 topics was simply too many to pack into such a short book. it felt very random & not a single topic was fleshed out

antog8's review against another edition

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informative reflective fast-paced

3.5

lnt's review

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2.0

Overall a superficial read, and even though there should only be general information about different topics, it felt that some of them were just opinions with barely any science to back them up.
Number's don't lie, yes, but they can be manipulated easily to prove something else.
I was disappointed to read about the cow's milk and the meat sections, and also the chapters talking about the impossibility to ditch fossil fuel. Clearly, the overall mood regarding climate change felt very pessimistic and superficial, but in a way that makes you think that we're stuck in a status quo and we've no way getting out of it.
Either the research was not enough or the numbers were presented in such a manner that appealed to his own perspective.
Some of the chapters presented nice facts to know, but they consisted maybe 10% of the book.

astroesteban's review

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informative medium-paced

3.75

kaelyng's review against another edition

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informative fast-paced

2.5

sjbanner's review against another edition

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informative reflective medium-paced

3.5

mzipprick's review

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informative fast-paced

3.75

arjan's review against another edition

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fast-paced

3.0

mahir007's review

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5.0

معدل الخصوبة الإجمالي (TFR) هو عدد الأطفال المولودين لكل امرأة خلال حياتها. أكثر القيود الجسدية المؤثرة عليه ، هو طول فترة الخصوبة (من الحيض إلى سن اليأس). انخفض عمر الحيض الأول من حوالي 17 عامًا في مجتمعات ما قبل الثورة الصناعية إلى أقل من 13 عامًا في العالم الغربي اليوم ، بينما تقدم متوسط ​​بداية سن اليأس قليلاً ، إلى ما يزيد قليلاً عن 50 عامًا ، مما أدى إلى فترة خصوبة نموذجية تبلغ حوالي 38 عامًا ، مقارنة بحوالي 30 عامًا في المجتمعات التقليدية.

تحدث من 300 إلى 400 عملية إباضة لدى الأنثى خلال فترة الخصوبة. بما أن كل حمل يستبعد عشر عمليات إباضة ولأنه يجب طرح 5-6 إباضة إضافية لكل حمل - بسبب انخفاض فرصة الحمل خلال فترة الرضاعة الطبيعية الطويلة تقليديًا - فإن الحد الأقصى لمعدل الخصوبة هو حوالي عشرين حالة حمل. مع بعض الولادات المتعددة ، يمكن أن يتجاوز المجموع 24 ولادة حية ، وقد أكدت السجلات التاريخية أن هناك نساء أنجبن أكثر من 30 طفلاً.
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Vaclav Smil
Numbers Don't Lie
Translated By #Maher_Razouk