IOTL, the only SSRs that declared independence were Estonia, Latvia, Lithuania, Georgia (though the Abzhakian ASSR split off and joined the CIS), Moldova (the eastern part seceded and joined the CIS in 1992, yet it is still a point of contention) and Armenia. The Soviet Union reformed into a capitalist CIS - Confederation of Independent States. The CIS was from 1991 to 2000 a democracy under the presidencies of Yeltsin and Chernomyrdin, and since 2000 an autocracy led by Alexander Lebed and following his assassination in 2011 Dmitry Rogozin.
Had all of the Soviet SSRs declared independence, what would this mean for the 1990s? The Russian SSR would most certainly be the most powerful, yet it would be much weaker than the CIS. Would we see a unipolar 21st century, where America is the top dog? What about the joint CIS-Iran invasion of Afghanistan in 2001, and the ensuing war? Perhaps Iran does not become a nuclear state and the Shia Hazaras in Afghanistan don't secede. We might also see a smaller NATO and EU, seeing as how most of the Balkans and Eastern Europe have joined both organizations.
Had all of the Soviet SSRs declared independence, what would this mean for the 1990s? The Russian SSR would most certainly be the most powerful, yet it would be much weaker than the CIS. Would we see a unipolar 21st century, where America is the top dog? What about the joint CIS-Iran invasion of Afghanistan in 2001, and the ensuing war? Perhaps Iran does not become a nuclear state and the Shia Hazaras in Afghanistan don't secede. We might also see a smaller NATO and EU, seeing as how most of the Balkans and Eastern Europe have joined both organizations.