As the post-cold-war unipolar system transforms into a polycentric one, it becomes more complex and less predictable. The new system may be crushed with less effort than needed to keep it on track. The polycentric international system, as it emerges, suffers from hybrid threats. They are difficult to identify and predict. Russia pioneered exploiting the new vulnerabilities to gain unilateral advantages. Russia's hybrid war against Ukraine was just a starting episode of her wider attempt to crush the whole world order. Responsible world powers have either to fix the vulnerabilities of the polycentric world, or to block malicious attempts to exploit it.