Doctrine is a sans-serif family which includes an agreeable text face and a more muscular stencil display face. From the obscure starting point of the North Korean national airline livery, Doctrine has grown to encompass a series of more mature typographic influences. By blending elements of twentieth-century neo-grotesque, humanist and geometric styles, Doctrine is at once universal and idiosyncratic. Including a vast array of ligatures and alternate characters in five weights ranging from thin to black, Doctrine is capable of handling a multitude of testing typographical situations.