The most powerful part of the book revolves around the original meaning of the first amendment and how it's changed over time. What struck me most was the blatant attempts to circumvent the amendment so soon after it was implemented. It is true that the meaning was nearly as wide as it is today. Sedition laws were common, relatively speaking. They have been enacted as recently as WWI with Woodrow Wilson. In most case they were struck down shortly after being implemented. One interesting case was with John Adams who had a sedition law put in place, largely to keep his VP, Thomas Jefferson, quiet. The sedition laws made it illegal to criticize the president. The Adams law lost out when Jefferson was elected and he had the law removed from the books.
Lewis continues with a number of court cases that changed how freedom of speech is viewed. In some cases the same supreme court justice ruled differently on similar cases. I didn't make it a point to memorize the cases, or I'd never finish the book. The most interesting change was how libel came to be judged. In the early times just stating something that was true, but negative could be ruled as libel. Over time that interpretation lost it's hold and libel became something where the damages needed to be proven along with malicious intent.
I left the book appreciating the first amendment much more after seeing the road that it's followed and the opportunities that existed to send it down a different path. What makes the amendment so important is that it protects what we don't necessarily like to hear. It brings to mind my OB (Organizational Behavior) class from grad school. One of the keys to effective meetings/decision-making was the inclusion of the devils advocate. This was important to avoid groupthink. What allowing these voices do for the public mind is to keep us honest the the same way I learned in the OB class.
If we only have one accepted opinion, then we can't earn anything new; we are also unable to truly defend our position, because we don't know how to view it through the skeptical lens that these rabble-rousers force us to. When an idea is solid and reasonable, it will withstand criticism and dissent. Where it is weak it will be made stronger. We come into serious danger when we can't criticize or think critically about people and issues. Next thing you know we're sending up a Space Shuttle with defective O-rings, metaphorically speaking. The other good thing about the dissenters is that in general they aren't necessarily that off the rocker. It's a new view that can lend to the larger society, though it takes time.
I guess I didn't cover the book that much, but it is worth the time. It's a short book and I think that al should give it a read. I really think the book would be ideal for a high-school government class. The approach is simple enough and I think it can generate good discussion not just about the first amendment, but about the other parts of the bill of rights.