For this I ♥ Free Software Day, let's celebrate copyleft. It's not just about building a world where software serves its users (rather than the other way round) but also *defending* that world from those that would take that freedom away by ensuring that these freedoms continue to persist in derivative works. Let's celebrate and uphold these defenses via copyleft! #ILoveFreeSoftware #ILoveFS #FSF #FreeSoftware #SoftwareFreedom #Copyleft