The main work of Ivan Antunović was his treatise "Razprava o podunavskih i potisanskih Bunjevcih i Šokcih u pogledu narodnom, vjerskom, umnom, građanskom i gospodarskom" (Discussion of the Bunjevci and Šokci at the Danube and Tisa, in the matters of nationality, religion, mind, citizen life and economy), printed in Vienna in 1882. This book described his programme of encouraging the people to preserve their history and to establish a consciousness of their origin, language and faith, which he deemed essential for their survival against assimilation. In the book he also emphasised the importance of a social reconstruction of the family in these communities, thereby developing a feeling of solidarity both within the family and between the families and indeed an entire nation, both the communities in Vojvodina and the main body of it in Croatia.