This very clearly and simply describes the differences between absolute freedom, limited freedom, and the value of limiting freedom. In a way, it's similar to the paradox of tolerance, and a tolerant society needing to be intolerant of those that are intolerant. Or to quote Team America: freedom isn't free. I may be re-thinking my own use of BSD licensing in favour of something more copyleft in future too.
> In a way, it's similar to the paradox of tolerance, and a tolerant society needing to be intolerant of those that are intolerant. That's not a paradox; you're just intolerant. Whether you're right or wrong to be so is immaterial, as is whether the people you're intolerant of are also intolerant.
If you're tolerant of intolerance, you may be tolerant, but others will be intolerant. If you want a tolerant society, you need to be intolerant of intolerance.
Of course to write it down like that, it sounds like they're the same kind of intolerance, but they're not, and that's also the solution to the paradox: it's intolerance of people who are simply being who they are, that's oppressive and therefore unacceptable, but intolerance of oppression is necessary if you don't want oppression.
Copyleft vs permissive is kinda the same thing. I hadn't really looked at it that way yet, but I see the similarity.