If You Believe in IP, How Can You Teach Others?I propose Wizard's Law: People are absurd to the limit of their legal ability.
& Coda: People are absurd to the limit of their likely ability to evade legal consequences.
EDIT: Alright, I'm updating this article with a basic overview & history behind copyright and general property laws.
1) People haven't always been able to own property legally. In fact, for most of history they couldn't. Capitalism, a new theory which holds that everyone has an equal right to the ability to own property (not to actually own property, but to be able to), has drastically expanded what people can view as 'theirs'.
2) Property law is based on the idea that one can have property, and that losing the property damages the owner. This is obvious for most physical objects: If you steal my car, I have lost access to and control over the car. I can no longer transform the car into money (ie, sell it) if I need to.
3) IP is different from regular property because one can take it
without causing the owner to lose it. This causes all kinds of wrinkles. Ex: You have a picture of the car. I make a copy of your picture, and now also own an identical picture of a car. But you still have the picture and can convert it to cash, so by regular-property standards I haven't damaged you. If your picture is very rare and worth a lot of money I might be able to sell it as an original, but you still aren't damaged. If I managed to convince people that your picture is a fake and mine is real, you're damaged, but only because I'm perpetrating fraud. Which is different from taking property, and a separate offence for which you can sue me.
This is the most basic area of difference between regular property and IP (not the only one, but the most central).
Main points of US copyright law, and most international copyright laws that I'm aware of include:
1) You can only copyright a specific expression of an idea, not the idea itself. This is important for music, books, software, science, etc. Basically any field dependent on creating ideas and turning them into products. I actually can't think of any area of human life that this
isn't important for.
Frivolous and yet Scary Ex: If we had copyright on ideas, Tolkien could have copyrighted his elves, & no one else would be able create elves. This would significantly reduce the amount of recreational reading material available today, along with almost every computer game that uses elves, most role-playing systems, figurines, etc. Huge devastating effect on cultural vibrancy. Same thing applies for physical laws, computer algorithms, the process of weaving, making fire...
2) You can patent idea-like things in the process in inventing them, but it's a multi-year & very expensive process, usually used for specific products and physical creations. The US Supreme Court is in the process of likely striking down attempts to patent business methods (ie, ideas), which means that the Stanford professors couldn't patent the ideas they are teaching either.