"Here's my favorite example, here: 1928, my hero, Walt Disney, created this extraordinary work, the birth of Mickey Mouse in the form of Steamboat Willie. But what you probably don't recognize about Steamboat Willie and his emergence into Mickey Mouse is that in 1928, Walt Disney, to use the language of the Disney Corporation today, "stole" Willie from Buster Keaton's "Steamboat Bill."
It was a parody, a take-off; it was built upon Steamboat Bill. Steamboat Bill was produced in 1928, no [waiting] 14 years--just take it, rip, mix, and burn, as he did [laughter] to produce the Disney empire. This was his character. Walt always parroted feature-length mainstream films to produce the Disney empire, and we see the product of this. This is the Disney Corporation: taking works in the public domain, and not even in the public domain, and turning them into vastly greater, new creativity. They took the works of this guy, these guys, the Brothers Grimm, who you think are probably great authors on their own. They produce these horrible stories, these fairy tales, which anybody should keep their children far from because they're utterly bloody and moralistic stories, and are not the sort of thing that children should see, but they were retold for us by the Disney Corporation. Now the Disney Corporation could do this because that culture lived in a commons, an intellectual commons, a cultural commons, where people could freely take and build. It was a lawyer-free zone."
-- Lawrence Lessig, "Free Culture", OSCON 2002 (https://youtu.be/uH4RskpUFiA?si=IHVC72F4oXpLHJVV&t=253)