Alexander J. Motyl: Why the realists were wrong about the war in Ukraine

A relative reacts at the cemetery where buried Ukrainian servicemen and volonteers died during the war in the east of the country, markng the All Saints Day, in the western Ukrainian city of Lviv on Nov. 1.
The ongoing ceasefire in eastern Ukraine may or may not lead to a lasting peace, but it has already had one important consequence: it has undermined both Russian and realist interpretations of the Russo-Ukrainian war.