_Prime Mover: A Natural History of Muscle_ by Steven Vogel is an ambitious work of both natural and human history. The author in this book showed how muscle worked (in general, not just in humans), how humans have used it, and how muscle and muscle-dependent (human and animal) activities, tools, and weapons have shaped world history, culture, and technology.
Understandably, the first section of the book detailed the structure and function of muscle, including how it is constructed down to the molecular level, how it is made to do work, how it is supplied with energy, how it was connected to the rest of the body, and the different types of muscles that exist. Comprising the first six of the book's fifteen chapters, it was an important part, covering not only a lot of biology but also a good deal of physics (indeed physics was quite important in later discussions of how muscle and muscle-dependent technology worked and affected human history).
The first section was very interesting and informative much of the time, covering for instance the differences between twitch muscle fibers and tonic muscle fibers (the former, lighter in color, are great for quick, sharp actions but fatigue easily, the latter darker, contracting more slowly, but able to resist fatigue a great deal better) and how the propriocoptive system works (one of the senses - not unlike seeing or hearing - that encompassed reflexes and quicker-than-thought reactions to such things as hot surfaces and is made up of muscles, tendons, and nerves). As with the rest of the book, this section was well illustrated. Vogel did a pretty good job overall in his coverage of the biology of muscle, keeping it for the most part comprehendible and engaging to the lay person, though I thought it got just a little too detailed and technical for me at times (and one or two parts of it frankly were quite hard to get through).
Most of the rest of the book dealt with a wide variety of tools, weapons, and activities, covering their history, why and how these items and activities developed, what muscles (human or animal as the case may be) were used as well as how they were used, and why they were (as occurred in most cases) eventually replaced with items not as dependent on muscular activity. This to me was the most interesting part of the book, with Vogel providing fascinating insights and perspectives on such items as screw drivers, hammers, axes (fascinating coverage of this topic, as the author discussed among other things how stone axes were used and the how the centers of percussion and gravity and thus the effectiveness of axes were altered by where an ax handle and ax head met, how they were attached, and the materials used in both head and ax), cranks, paddled and rowed ships (the reader learns the advantages and disadvantages of both and why ships that could be both sailed and rowed - as were Viking ships and the galley ships in the Mediterranean- faced unique problems; sailing ships must be ballasted to sail crosswind and that extra weight can complicate rowing and in addition sailing other than downwind generally made ships heel over, something avoided by ships having high sides, a solution that made oar placement problematic), bicycles, human-powered aircraft (a wonderful section), wheelbarrows (I think the reader will find we take for granted their simple but highly effective design), backpacks, monument construction (notably with regards to the Egyptian pyramids and Stonehenge), cutting down trees (the history of the crosscut saw was surprisingly interesting), plows, treadmills, (which were once used in prisons as a means of punishment), chariots, wagons, boomerangs, atlatls, slings, blowguns, crossbows, and trebuchets (the last several items requiring a fair amount of physics).
In addition to an in depth and interesting discussion of the evolution of animal-powered tools and vehicles, Vogel covered at length why certain animals were domesticated and their relative advantages and disadvantages. The historical rivalry between those who favored horses and those who favored oxen merited its own interesting chapter. Overall the coverage of these animals and others dovetailed nicely with discussion on the domestication of animals in Jared Diamond's excellent _Guns, Germs, and Steel_.
The final section dealt with muscle as food, covering what role muscle as food has played in human evolution and in recorded history and what are the advantages and disadvantages of diets rich in muscle and muscle-free. There was even a small section covering human cannibalism, with the author demonstrating that while survival cannibalism and ritual cannibalism certainly existed, it is just not possible for routine nutritional cannibalism to have been at the very least effective and generally even possible at all.
Overall _Prime Mover_ was an interesting book and one that I am glad that I read, good as both a work of human history and natural history.