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Innokentiy Gizel is generally considered as the author of Synopsis, however, this is still arguable. Synopsis was the first Slavic textbook on history. It was rather popular until the mid-19th century and survived some 30 editions.
It was written shortly after the convention of the Treaty of Pereyaslav (Pereyaslavl Rada), which ratified Ukraine as a protectorate of the Russian Empire. The book began with the history of the origins and lifestyle of the Slavs and ended with the mid-17th century in the first edition. The second and third editions (1678 and 1680) end with the Chigirin Campaigns of 1677-1678. Synopsis covers the history of Kievan Rus', Mongol invasion of Rus', struggle against the Crimean Tatars, Turkey, and Poland. The author of the Synopsis asserted that the Russian tsars were the legal successors of the Kievan grand princes. Synopsis is notable since it clearly demonstrates that the idea of uniting all East Slavic people under the authority of one state was born not in Moscow but in the south-western lands of former Kievan Rus' and designed in Kiev.