The events surrounding the disintegration of the Soviet Union are deeply intertwined with Mikhail Gorbachev's leadership from 1985 onwards. Gorbachev implemented significant reforms, particularly 'glasnost' (openness) and 'perestroika' (restructuring), intended to revitalize the stagnant economy and foster greater political freedoms. However, these reforms unintentionally catalyzed nationalist sentiments in various Soviet republics, leading to widespread demands for autonomy and independence. This period saw the fall of the Berlin Wall and the collapse of communist regimes throughout Eastern Europe, effectively signaling the end of the Cold War. As republics like Lithuania and Ukraine declared independence, the central authority struggled to maintain control. The dissolution of the Soviet Union was formalized in December 1991, profoundly affecting global politics and leading to the establishment of new nations and the shifting of international dynamics towards a unipolar and multipolar world, with the United States emerging as a dominant power.