A Croatian historian and polyglot of international reputation, known by his numerous scientific contributions, especially in the field of albanology.
In 1928, when Stjepan Radić was assassinated in the Yugoslav parliament, a year before king Alexander would establish his dictatorship, Šufflay wrote Hrvatska u svijetlu svjetske historije i politike (Croatia in the Light of World History and Politics). He wrote that the Croatian people was suffering under the Yugoslav dictatorship and that it had to free itself. He claimed that the border between the Western and the Eastern civilization lay on the Drina river, the "destined borderline on the Drina river on which the mighty Roman Empire snapped into two... a border both spiritual and cultural".
The Croatian people have passed through the Roman-Western retort, while the Serbian people passed through the Byzantine-Turkish. Therefore the psyche of the two peoples is essentially different, even if the languages are similar. Unification of the two peoples would mean neutralization and careful constraining. To centralize here would mean to make Croatia a guinea pig for vivisection experiments. It is my thesis that the Croatian nation, as a citizen of the great empire of the western civilization, has the right to raise its voice against any oppression. Those who know history know that the Yugoslav idea has no dynamics. It is nothing compared to the mighty Croatian idea. In Croatia, the Yugoslav idea is a shallow wreckage under which the Croatian national volcano boils; only a subtle push is necessary to make it erupt. To me personally, as a philosopher and an open-minded Croat, it is the same whether I sit shackled at the court or a penitentiary, or whether I get out into the false freedom hiding the larger dungeon in which – thank God, only temporarily! – the Croatian nation is suffering! Šufflay's idea about the delineation on the Drina river would later influence Greater Croatian irredentism.
The members of the regime organization, Young Yugoslavia, under the royal protection, ambushed him at his doorstep in Zagreb and broke his skull with a hammer, killing him. Then they broke into his apartment and took the manuscript of the 3rd book of Codex albanicus.
His monograph from 1925, The Serbs and Albanians is great work. Other works:Hrvatska i zadnja pregnuća istočne imperije pod žezlom triju Komnena (Croatia and the Last Efforts of the Eastern Empire under Three Comnenuses, 1901)
Die Dalmatinische Privaturkunde (Dalmatian Private Deeds, 1904)
Acta et diplomata res Albaniae mediae aetatis illustrantia (Diplomatic and Other Documents on Medieval Albania, with Jireček and Thalloczy, Vienna, first book in 1913, second book in 1918)
Kostadin Balšić (1392-1401): historijski roman u 3 dijela (Kostadin Balšić: A Historical Novel in Three Parts, 1920)
Srbi i Arbanasi (Serbs and Albanians, 1925)
Na Pacifiku god. 2255.: metagenetički roman u četiri knjige (On the Pacific in 2255: A Metagenetic Novel in Four Books, first printed as a book in 1998)
Hrvatska u svijetlu svjetske historije i politike : dvanaest eseja (Croatia in the Light of World History and Politics: Twelve Essays, 1928, reprinted in 1999)
Hrvati u sredovječnom svjetskom viru (Croats in the Global Medieval Upheaval, 1931)
Picture of The Komnenos dynasty of Byzantine emperors was founded by Isaac I Komnenos, a Stratopedarch of the East under Michael VI. In 1057 Isaac led a coup against Michael and was proclaimed emperor.