Quaker governance follows directly from Quaker theology, and it produces a decision procedure used by no other religious body of comparable age.
Traditional worship is unprogrammed: Friends sit in silence, and anyone, any member, of any age or sex, may speak if moved to. There is no minister, no liturgy, no sermon prepared in advance, no hymn, and no order of service. There are also no outward sacraments. Friends do not baptise and do not celebrate communion, holding not that these are optional but that the reality they signify is given directly and the outward sign is therefore unnecessary.
Business is conducted in a meeting for worship for business, and the distinguishing feature is that Friends do not vote. A clerk gathers the sense of the meeting and drafts a minute; the meeting either unites with it or does not, and if it does not, the matter waits. A single Friend standing in the way of a minute is not outvoted but heard, and business can be held over for years. Structurally, local preparative and monthly meetings send to quarterly and yearly meetings, which are the highest bodies; there is no world authority, and yearly meetings differ from one another substantially.
The Society has no creed, and it means it. Membership does not require assent to any proposition. That is also where the tradition's deepest division opened: from the 1820s, splits in America between the evangelical and the more mystical wings produced separate yearly meetings, and much of Quakerism outside Britain today is programmed, with paid pastors, hymns, prepared sermons and an explicitly evangelical theology, which would be unrecognisable to Fox in form while claiming direct descent from him.