What did Vladimir do in 988 to help unify his people?

In 988, Vladimir the Great adopted Christianity as the state religion of Kievan Rus' and subsequently baptized his people in the Dnieper River. This significant religious transformation helped unify the diverse tribes under his rule, fostering a sense of shared identity and culture. By aligning Kievan Rus' with the Byzantine Empire, Vladimir also established political and cultural ties that strengthened his authority and promoted literacy and the arts among his people.