The Short Version
The claim that Slavic peoples share a common origin is well-supported by mainstream scholarship. Multiple recent ancient DNA studies (2024–2025) from leading institutions converge on a shared ancestral homeland in southern Belarus and central Ukraine. Linguistic evidence also traces all Slavic languages to Proto-Slavic. However, direct genetic evidence from the earliest Slavic core regions remains limited, and significant regional divergence occurred after expansion. The core claim is accurate, but "common origin" slightly oversimplifies a complex picture.