Size: How It Explains the World

The sheer breadth of knowledge Smil manages to compress into these pages is nothing short of breathtaking. From the structural limitations of wood versus steel to the way cities scale like biological organisms, the interdisciplinary connections are brilliant. I particularly loved the debunking of the Golden Ratio—it’s refreshing to see someone use cold, hard data to challenge popular myths about aesthetics. The section on BMI and the increasing scale of modern homes provides a sobering look at our societal obsession with 'bigger is better.' It is a challenging read that demands your full attention, but the reward is a much deeper understanding of the physical constraints that govern life and technology. This is Smil at his most encyclopedic and observant.

Wait until you get to the section comparing the power output of insects to industrial machinery—it’s mind-blowing. This is the kind of multidisciplinary thinking that we desperately need more of. Smil connects biology, physics, and history into a comprehensive look at how scale defines what is possible. He doesn't shy away from complex math or statistics, which I found refreshing in an era of oversimplified pop-science. Whether he's discussing the height of the world's tallest buildings or the caloric needs of a Lilliputian, his focus remains on the measurable truth. It is a dense, data-rich masterpiece that will change the way you look at the world around you. Absolutely fascinating stuff from a true polymath.

Ever wonder if a mosquito's wing operates on the same physical principles as a Boeing 747? Smil’s exploration of scaling laws is an absolute treasure trove for anyone obsessed with how the physical world actually functions. He manages to link the power-to-mass ratio of tiny insects directly to jet engines in a way that feels like a revelation. To be fair, the book is incredibly dense and occasionally feels like a data dump, but the insights into metabolic rates and urban infrastructure are worth the effort. It is not exactly a light beach read. However, for those who enjoy seeing the hidden mathematical scaffolding of our universe, this is a must-have. The unique summaries at the end, especially the ten-word distillation, provide a clever capstone to a massive amount of information.

Smil’s 'Size' is less of a narrative and more of a masterclass in how physical constraints shape our entire reality. The way he explains the difference between linear growth and non-linear scaling helped me understand why simply doubling the size of a machine often leads to unforeseen failures. Personally, I found the deep dive into metabolic rates and animal sizes to be the strongest part of the book. While the tone is undeniably academic and the data can be overwhelming, the breadth of the research is undeniably impressive. Some readers might find the debunking of Gulliver's Travels petty, but it perfectly illustrates his point about the biological impossibility of certain scales. It’s an enlightening, if dense, read.

You might think you understand the golden ratio, but Smil is here to dismantle your assumptions with cold, hard numbers. His approach is clinical and thorough, which is exactly what makes his work so reliable. The book is an exhaustive look at how size dictates everything from the efficiency of our hearts to the power output of our largest industrial engines. I appreciated the effort to categorize different types of distributions, even if the math got a little heavy toward the end. My only real complaint is that the book feels a bit like a collection of separate essays rather than a unified journey. Still, the insights regarding urban density and energy use are classic Smil and highly relevant.

Smil is back with his signature deluge of data, though this time the focus feels a bit more scattered than his energy-centric works. The book covers everything from the size of the known universe down to the submicroscopic level, touching on Kleiber’s Law and the complexities of metabolic scaling along the way. While the information is fascinating, the middle section on the 'Statisticians Hall of Fame' was a difficult hurdle to clear. It’s hard to stay engaged when the author pivots into a lengthy tutorial on standard deviation and normal distributions. Truth is, the book is a bit of a crazy quilt of trivia. It's a decent reference for those curious about allometry, but it lacks the narrative drive I’ve come to expect from Smil.

Finally got around to reading Smil's take on size and, gotta say, it’s a bit of a mixed bag. On one hand, the comparison between the smallest model airplane motors and massive marine diesels is the kind of nerdy content I live for. On the other hand, the book often gets bogged down in technical minutiae that seems to go nowhere. Not gonna lie, I found myself skipping through parts of the statistics chapter just to get back to the biological scaling stuff. The ten-word summary at the end—'Size, an omnipresent scalar, is the measure of all things'—is clever, but it almost confirms that the book is just a long-winded way of stating the obvious. It’s okay, just not his best.

This felt more like a random collection of Wikipedia entries than a cohesive argument. I have enjoyed Smil’s previous work on energy transitions, but this volume seems to lack a clear destination or a punchy thesis. He spends far too much time critiquing the physics of Jonathan Swift’s Gulliver’s Travels, which felt like an unnecessary distraction from more modern scaling concerns. Look, I appreciate the depth of research, but the narrative is so disjointed that I found my mind wandering every few pages. The layout didn't help either; the long line lengths and tight margins made the technical data even harder to digest. Frankly, it is a bit of a slog that fails to deliver a satisfying conclusion despite the author's obvious brilliance.

As someone who generally enjoys technical non-fiction, I found the lack of a central thesis here deeply frustrating. Smil seems determined to connect everything to size, but the result is a narrative that feels forced and frequently repetitive. One moment you're reading about the history of the meter, and the next you're buried in a critique of fictional giants' bone density. The transition between topics is jarring. To be fair, there are some great nuggets of information about how SUVs are ruining our efficiency gains, but they are buried under mountains of dry academic prose. It’s essentially a randomized Guinness Book of Records for people with PhDs. I expected more from such a renowned thinker.

Why did the author feel the need to spend dozens of pages debunking the mathematics of Lilliputians? It is honestly baffling. This book is a massive disappointment because it never moves beyond simple observations that size is important. We already know that. The writing is incredibly dry and the 'Four Conclusions' at the end felt like a lazy way to avoid actually synthesizing the material into something useful. I almost didn't finish it because the tone felt so pedantic and the structure was nonexistent. If you want a book about scaling, read 'Scale' by Geoffrey West instead. This one is just an overpriced collection of facts that doesn't add up to a coherent point.