> There are physical goods that are reproducible for very low marginal costs. Clothes, food, etc, medicine, etc, are all very cheap to produce in large quantities. Is there a moral obligation to provide those goods--not for free but for their low marginal cost, to anyone who will prosper from it?

A physical good (food, clothes) is depletable, and in that way too unlike digital data, which is for all practical purposes undepletable. But if you consider even highly inexpensive physical goods, they have various substantial costs of transportation, inventory, etc. associated to them, and thus they are not truly as fluidly and effortlessly reproducible in the way that digital data is reproducible for zero cost.

You have a network in which it is so convenient to share that it's almost begging you to. There's a lot of fundamental rethinking of commerce here, and I was quite bugged by it all when I started looking into it myself. But when you see how badly the bigger half of people in this world are suffering it's easier to see why this is necessary.

You're going to get a much better explanation of things from Moglen himself than me -- here, the transcript to the video I linked (if you're unable to watch the video): http://en.wikisource.org/wiki/Free_and_Open_Software:_Paradi...