Insurrectionary anarchism is distinguished from "plain anarchism" on questions of approach more so than on what one is for and against.
IA is thus associated with the critique of formal organization, practices of informal organization, attack, permanent conflict, illegalism, and other matters that are primarily practical rather than ideological.
But beneath this thrust are two clear ideas--one dealing with time and another with relationships--that are both refusals of mediation. Firstly, IA is characterized by the rejection of a future revolution (waiting for it or making progress toward it); instead, insurrection is seen as something to be immediately practiced. Secondly, IA rejects the bodies that mediate the spaces between individuals and organizes them in mass revolutionary activity.
The distinction was first expressed by Stirner, whose ideas have been enormously influential to all of the well-known insurrectionary anarchists:
"Revolution and insurrection must not be looked upon as synonymous. The former consists in an overturning of conditions, of the established condition or status, the State or society, and is accordingly a political or social act; the latter has indeed for its unavoidable consequence a transformation of circumstances, yet does not start from it but from men's discontent with themselves, is not an armed rising, but a rising of individuals, a getting up, without regard to the arrangements that spring from it. The Revolution aimed at new arrangements; insurrection leads us no longer to let ourselves be arranged, but to arrange ourselves, and sets no glittering hopes on "institutions." It is not a fight against the established, since, if it prospers, the established collapses of itself; it is only a working forth of me out of the established. If I leave the established, it is dead and passes into decay. Now, as my object is not the overthrow of an established order but my elevation above it, my purpose and deed are not a political or social but (as directed toward myself and my ownness alone) an egoistic purpose and deed."