The All-Russian nation (Russian: общерусский народ, translit. obshcherusskiy narod), also known as the pan-Russian nation or the triune Russian nation (Russian: триединый русский народ, translit. triyedinyy russkiy narod) is a Russophile and Russian irredentist ideology which sees the Russian nation as comprising the three historical and regional regions of Kievan Rus' (Great Russia, Little Russia and White Russia) and branches of Rus' people, which include modern East Slavs (namely, Russians, Ukrainians and Belarusians), rather than only modern Russia and ethnic Russians. An imperial nation-building dogma, it was used in an unsuccessful attempt to transform the Russian Empire into a nation-state on the basis of a triune "All-Russian" nationality that consisted of all East Slavs. The concept was coined predominantly by the Kievan clergy and became the official state-sponsored national identity of the Russian Empire, which by the 19th century was embraced by many imperial subjects (including Jews and Germans) and served as the foundation of the Empire. The title "Tsar Of All Rus'" borne by every Russian ruler after Peter the Great reflects the official status of this ideology in the Russian Empire.