The press polemic with nationalist Basque ideologues, until 1903 with Sabino Arana and then with his successors, continued also throughout first decades of the 20th century. It gave rise to Echave-Sustaeta's massive 530-page book, published by
El Pensamiento Navarro in 1915 and titled
Estudio histórico. El Partido Carlista y los Fueros. Con inserción de gran número de documentos, muchos inéditos; the title was a clear reference to Arana's 1897 pamphlet
Partido Carlista y los fueros vasko-nabarros. The volume was largely a compilation of articles, published earlier in
El Pensamiento. It was prologued by
Juan Vázquez de Mella, at the time the key Carlist theorist, Cortes deputy and as great speaker sort of celebrity, which positioned the book as a quasi-official party voice on the issue. The work was promoted in Traditionalist press until 1917, though its impact beyond the Carlist audience was minor.
El Partido Carlista y los Fueros in 68 chapters discussed the history of Carlist position towards separate legal establishments mostly of Navarre, though extensively dealing also with Álava, Gipuzkoa, and Biscay;
Catalan and
Aragonese fueros were merely mentioned. The narrative covered the period from 1812 to 1912, between the
Constitution of Cádiz and latest pronouncements of the new claimant
Don Jaime. It was formatted as a historiographic discourse with numerous lengthy quotations from various, mostly though not exclusively Carlist documents, included either in footnotes or in the main body of the text. The volume was intended to demonstrate that throughout the last 100 years Traditionalism was the only current which genuinely incorporated heterogeneity of local regimes into its doctrine and that Carlism was the only party which systematically strove to defend them against centralisation of liberalism-driven
Madrid governments. It was also supposed to repudiate nationalist Basque claims that Carlist defence of fueros was merely an opportunistic measure. of
país vasco-navarro Together with his press publications the volume presents Echave-Sustaeta's and to a large extent also the Carlist vision. Fueros are presented as innate, history-grounded regulations to be respected and not as privileges (or contracts), granted (or agreed) by (or with) central authority. They are perceived as specific for separate entities (Navarre, Álava, Gipuzkoa, Biscay) and not as applicable generically to the region. However, despite different internal regimes of all 4 organisms, he understood them to be one entity,
Laurak bat (and did not make references to
Zazpiak bat, which included also 3 French provinces). When advocating
revindicación foral Echave-Sustaeta considered only the pre-1839 regulations as genuine; he viewed later arrangements as distortions, and dismissed the call to restore them as liberal
fuerismo. He did not pursue a separatist claim and has never campaigned for breakup with Madrid; his vision was this of
monarquía federal, with the king of Spain ruling in Pamplona as king of Navarre or in Bilbao as lord (señor) of Biscay. Though he acknowledged Basque ethnic identity he neither recognized separate Basque political self nor did he relate it to fueros; he rather referred to "vasco-navarros" or "pueblo vasco-navarro", a community built by history and culture. ==Disengagement (1917–1929)==