Rumors are nearly as old as human history, but with the rise of the Internet, they have become ubiquitous. In fact we are now awash in them. False rumors are especially troublesome; they impose real damage on individuals and institutions, and they often resist correction. They can threaten careers, policies, public officials, and sometimes even democracy itself.

And so it's no surprise that people who object to the death penalty on pure moral grounds also think it has no deterrent effect, and people who like the death penalty on grounds of retribution tend to think it has deterrent effects. They like that, and they believe that. I think with climate change we're seeing very much the same thing where those who deny climate change, they don't like that, and they don't believe it.

Even though Star Wars is easily read as feminist for its time - and even for now, with Princess Leia's role - people wouldn't make a movie like that in 2016, where the guys are mostly the tough ones, and the women aren't in positions of authority.

Most problems are best solved privately, not through government. There's a problem of discourtesy in the world, which is best handled through social norms, which are indispensable. But you wouldn't want the government to be mandating courtesy.

A well-functioning democracy has a culture of free speech, not simply legal protection of free speech. It encourages independence of mind. It imparts a willingness to challenge prevailing opinion through both words and deeds. Equally important, it encourages a certain set of attitudes in listeners, one that gives a respectful hearing to those who do not embrace the conventional wisdom. In a culture of free speech, the attitude of listeners is no less important than that of speakers.

It's deeply human to do both the worst things and the best things because of your fear of loss.

Star Wars may be kind of a cartoon, but the original trilogy depicts a political paralysis which breeds an interest in a strong leader who will make a significant break with the past. And Hillary Clinton is a person - whether you like it or not - of extraordinary experience. I don't know if we ever had a presidential candidate with that level of political experience. There's no learning curve for her. And that, in some periods, would be a huge plus. In the end, I think it will be a significant plus for her now.