Why should russia be blamed for world war 1?

Russia played a significant role in the outbreak of World War I due to its support for Serbia following the assassination of Archduke Franz Ferdinand, which escalated tensions in Europe. By mobilizing its army in defense of Serbia, Russia prompted Austria-Hungary to declare war, setting off a chain reaction among the major powers. Additionally, Russia's alliances and commitments contributed to the polarization of Europe into opposing camps, ultimately leading to a larger conflict. While other nations also bear responsibility, Russia's actions were pivotal in the escalation of the crisis.