There are only about four hundred thousand Quakers worldwide, which makes the Religious Society of Friends by some distance the smallest body treated at this length, and its public footprint is out of all proportion to that number.
The distribution surprises most people. The largest Quaker population in the world is in Kenya, followed by Bolivia, Burundi and Guatemala; these are overwhelmingly programmed and evangelical meetings, the fruit of nineteenth and twentieth-century mission. British and North American Quakerism, which supplies most of the popular image of the tradition, is a minority of the whole and is declining. The consequence is a Society whose theological centre of gravity is now evangelical and Global South, while its unprogrammed, liberal, largely non-theistic wing holds the cultural recognition in Britain and the United States. The two wings are in limited contact and disagree about a great deal.
British and North American liberal Quakerism has moved a long way from Fox on belief while holding to his form of worship: surveys of British Friends find substantial proportions who do not describe themselves as Christian, and the meeting for worship is often understood in terms of shared silence rather than of Christ present. Evangelical Friends elsewhere regard that development as apostasy, and say so.
What the Society still supplies out of proportion to its size is institutional peace work. The American Friends Service Committee and the Friends Service Council shared the Nobel Peace Prize in 1947 for relief work in both world wars. Quaker offices at the United Nations and in Brussels do quiet mediation. Britain Yearly Meeting approved same-sex marriage in its meeting houses in 2009, some years ahead of English civil law, and did so by the same silent procedure it uses for everything else.