For quite some time in the past, we have been using Soviet-style socialism as standard socialism, but since the 1980s, people have begun to rethink "which is socialism, how to build society", and "Society "Is there only a model like the Soviet Union?". which is the logical premise of this passage? ['Soviet Union competes with the United States military.', 'Political change in Gorbachev, Soviet Union.', 'Soviet socialist theory has been criticized by British and American political critics.', 'Soviet-style socialism increasingly reveals drawbacks.']