What's the greatest human invention of the last two millennia? The Greatest Inventions of the Past 2,000 Years grew out of a Web-site project called Edge (www.edge.org), wherein the invited intelligentsia recorded their deep thoughts on a variety of topics. In 1998, editor John Brockman asked them to choose the creation that most shaped our world since year 1. For this book, Brockman picked a hundred of the most compelling entries from intellectual celebrities like Stewart Brand, Richard Dawkins, Steven Pinker, and Murray Gell-Mann. The printing press received a number of votes, as did the computer and television. Other entries were more eclectic: organized science, the contraceptive pill, the gun, or even hay. Chairs and stairs. Anesthesia. Cities. Each invention is justified by a short essay, some of which read like... well, Web-site prose. Also, a glaring sexism flaws the book--Brockman chose fewer than 10 women's submissions. Nevertheless, Greatest Inventions is a worthy addition to your millennial reading list, and lots of fun besides. --Therese Littleton