> It's a fragile model and does not deserve to be on the same list as these beautiful and useful ideas. I have a copy of the book at home, Ian Stewart is a ver

> It's a fragile model and does not deserve to be on the same list as these beautiful and useful ideas. I have a copy of the book at home, Ian Stewart is a very good populariser of maths. http://www.amazon.co.uk/Seventeen-Equations-that-Changed-World/dp/184668532X http://www.amazon.co.uk/Seventeen-Equations-that-Changed-Wor... You should take the title of the book literally, equations that changed the world (but not necessarily for the better).