From Colin Ward (1966), Anarchism as a Theory of Organization.
“[…] “anarchy” means the absence of government, the absence of authority. Can there be social organisation without authority, without government? The anarchists claim that there can be, and they also claim that it is desirable that there should be.
“Anyone can see that there are at least two kinds of organisation. There is the kind which is forced on you, the kind which is run from above, and there is the kind which is run from below, which can’t force you to do anything, and which you are free to join or free to leave alone. We could say that the anarchists are people who want to transform all kinds of human organisation into the kind of purely voluntary association where people can pull out and start one of their own if they don’t like it. I once, in reviewing that frivolous but useful little book Parkinson’s Law, attempted to enunciate four principles behind an anarchist theory of organisation: that they should be
(1) voluntary, (2) functional, (3) temporary, and (4) small.
They should be voluntary for obvious reasons. There is no point in our advocating individual freedom and responsibility if we are going to advocate organisations for which membership is mandatory.
They should be functional and temporary precisely because permanence is one of those factors which harden the arteries of an organisation, giving it a vested interest in its own survival, in serving the interests of office-holders rather than its function.
They should be small precisely because in small face-to-face groups, the bureaucratising and hierarchical tendencies inherent in organisations have least opportunity to develop.”