Slavs
Slavs can be further grouped by religion. Orthodox Christianity is practiced by the majority of Slavs. The Orthodox Slavs include the Belarusians, Bulgarians, Macedonians, Montenegrins, Russians, Serbs, and Ukrainians and are defined by Orthodox customs and Cyrillic script as well as their cultural connection to the Byzantine Empire (Serbs also use Latin script on equal terms). Their second most common religion is Roman Catholicism. The Catholic Slavs include Croats, Czechs, Kashubs, Moravians, Poles, Silesians, Slovaks, Slovenes, and Sorbs and are defined by their Latinate influence and heritage and connection to Western Europe. There are also substantial Protestant and Lutheran minorities especially amongst the West Slavs, such as the historical Bohemian (Czech) Hussites.
Slavic Native Faith
Slavic Native Faith underwent dramatic growth in Ukraine during the early and mid 1990s. In 2005, Ivakhiv noted that there were likely between 5000 and 10,000 practitioners in Ukraine. The religion's "main base" consisted of ethnic Ukrainians who were "nationally oriented" and who displayed higher than average levels of education. There is overlap between Slavic Native Faith followers and other sectors of Ukrainian society, such as the folk and traditional music revival groups, Cossack associations, traditional martial arts groups, and nationalist and ultra-nationalist organisations.