روس is a historical and cultural region in Eastern Europe, primarily associated with the early East Slavic state known as Kievan Rus. This state emerged in the 9th century and played a significant role in the development of Russian, Ukrainian, and Belarusian identities. The name "Rus" is believed to have originated from the Varangians, a group of Norse traders and warriors. The influence of Kievan Rus extended beyond politics, impacting religion, trade, and culture in the region. The adoption of Christianity in 988 AD marked a pivotal moment, leading to the spread of literacy and the establishment of Orthodox Christianity as a dominant faith. Today, the legacy of Rus is evident in the languages, traditions, and histories of the countries that emerged from this early state.