 The issue at debate is as political as it is linguistic because the division into Gallo-Romance and Ibero-Romance languages stems from the current nation states of France and Spain and so is based more on territorial criteria than historic and linguistic criteria.One of the main proponents of the unity of the languages of the Iberian Peninsula was Spanish philologist Ramón Menéndez Pidal, and for a long time, others such as Swiss linguist Wilhelm Meyer-Lübke ("Das Katalanische", Heidelberg, 1925) have supported the kinship of Occitan and Catalan.Moreover, the fact that Aragonese hasn't been studied as much as both Catalan and Occitan, many people label it as a Spanish dialect.