On the Historical Unity of Russians and Ukrainians is less a conventional history than a polemical state essay, published in 2021, that advances Vladimir Putin's argument that Russians, Ukrainians, and Belarusians share a single historical and spiritual inheritance. Its style is formal, declarative, and archival in posture, weaving medieval Rus', imperial policy, Soviet nationality questions, and post-1991 politics into a sweeping narrative. In literary and political context, it belongs to the tradition of nationalist historical argument, where selective chronology serves contemporary geopolitical claims. Vladimir Putin, Russia's long-serving president and former security-service officer, writes from the position of a statesman deeply invested in post-Soviet identity, borders, and Russia's role in Eurasia. His political career has repeatedly emphasized state continuity, civilizational sovereignty, and suspicion of Western influence. These concerns clearly shape the essay's interpretation of Ukrainian nationhood and independence, making the text inseparable from the ideological framework of modern Russian power. This work is recommended not as a neutral account of Ukrainian history, but as an essential primary source for readers seeking to understand contemporary Russian political rhetoric. Historians, political scientists, and general readers will find it valuable when read critically, alongside Ukrainian, European, and international scholarship.