Russia invaded Ukraine with impunity — and UN Secretary-General Antonio Guterres fears it may not be the last middle-sized power to pick a fight without consequence in the near future because global security governance is largely bankrupt.

"The capacity of deterrence that would exist if the whole powers, with the security council, will be able to say, 'This can't be done,' is not there," he tells Ian Bremmer on GZERO World.