Cory Doctorow: Publish books free online

"If you are building a business model that says that people can only copy things with your permission, your business is going to fail because whether or not you like it, people will be able to copy your product without your permission."

I think he is making a great point. This applies to "trade secrets", "patents", and "physics." Sharing your idea does not limit you, on the contrary, it enlarges the market. Corporations and scientific researchers do not get this fact.