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.
Post-Soviet transition in Ukraine
Between 1990 and 1991, several republics of the Soviet Union proclaimed their state sovereignty and then announced their independence. On July 16, 1990, the Ukrainian SSR's parliament issued its 12th legislation proclaiming the sovereignty of Ukraine's territory and the country eventually declared its independence on August 24, 1991. The declaration was then confirmed by the results of the referendum on December 1 later that year, where 90,3 % of voters were in favor of independence. The same day, Leonid Kravchuk, head of the Supreme Council of Ukraine, was elected as the country's first president. Following his election, an economic then political crisis developed and Kravchuk organized another presidential election as a response.