After the Second World War, the charter of the newly formed United Nations established an eleven-member Security Council and charged it with taking collective action in response to threats to world peace  The charter further provided that the five nations that were then the major powers would permanently have sole authority to cast vetoes
The reason given for this arrangement was that the burden of maintaining world peace would rest on the world' s major powers, and no nation should be required to assume the burden of enforcing a decision it found repugnant
it does not make sense to provide for democracy among nations when nations themselves are not all democracies