Book excerpt: Dizzying new technologies are putting unprecedented stress on America's core constitutional values, as protections for privacy, property, and free speech are shrinking due to the wonders of modern life-- from the Internet to digital imaging to artificial intelligence. Today, it's easy to think that we have far more privacy and other personal rights than we in fact do. Only by educating ourselves about the current state of the law and the risks posed by our own inventions can we develop an informed opinion about where to draw hard lines, how to promote changes in the system, and what we can do to protect ourselves.