MIT explicitly permits merging, publishing, sublicensing, and selling. BSD isn't explicit about it. BSD 2, 3, and 4 aren't explicit about that. Some people (e.g

MIT explicitly permits merging, publishing, sublicensing, and selling. BSD isn't explicit about it. BSD 2, 3, and 4 aren't explicit about that. Some people (e.g., lawyers) care about licenses being explicit rather than relying on implicit phrases like "any purpose" which sound rock solid but can still technically be argued about in court.