Rebuking Natan Sharansky

Some years back I remember Natan Sharansky advocating "democracy", with a primary rationale being democracies do not make war on each other. Russia is at least nominally a democracy but did not hesitate to invade the Ukraine, another democracy. Of course, a wholly-corrupt democracy may not have been what Natan was envisioning, but that is about all the world has left in the realm of democracies.