"Thus ‘structurelessness’ becomes a way of masking power, and within the women’s movement it is usually most strongly advocated by those who are most powerful (whether they are conscious of their power or not). The rules of how decisions are made are known only to a few and awareness of power is curtailed by those who know the rules, as long as the structure of the group is informal. Those who do not know the rules and are not chosen for initiation must remain in confusion, or suffer from paranoid delusions that something is happening of which they are not quite aware."
Jo Freeman, ‘The Tyranny of Structurelessness’, 1970.
Though published in 1970 I think this essay still makes for essential reading. So many of the feminist groups I’ve encountered have fallen foul of the problems Freeman outlines here.