The fourth freedom is rephrased as the "right to collaborate". Yeah, right, but the official "definition" is pretty clear to me so I don't see the point in re-writing it.
Moreover, but in my own opinion, nowadays free software is more about the obligation to share the modifications. I gather that many know what open source is, but that obligation, is crucially important and embodies the political statement of the FSF. It's what puts free software truly apart (and makes it great, IMHO). So I'd move the copyleft explanation higher in the list, closer to the 4 freedoms.
Moreover, but in my own opinion, nowadays free software is more about the obligation to share the modifications. I gather that many know what open source is, but that obligation, is crucially important and embodies the political statement of the FSF. It's what puts free software truly apart (and makes it great, IMHO). So I'd move the copyleft explanation higher in the list, closer to the 4 freedoms.