What ideas were the Soviet Union founded on, and how were those ideas implemented?

After overthrowing the centuries-old Romanov monarchy, Russia emerged from a civil war in 1921 as the newly formed Soviet Union. The world’s first Marxist-Communist state would become one of the biggest and most powerful nations in the world, occupying nearly one-sixth of Earth’s land surface, before its fall and ultimate dissolution in 1991. The United Socialist Soviet Republic, or U.S.S.R., was made up of 15 soviet republics: Armenia, Azerbaijan, Belarus, Estonia, Georgia, Kazakhstan, Kyrgyzstan, Latvia, Lithuania, Moldova, Russia, Tajikistan, Turkmenistan, Ukraine and Uzbekistan