Within the modern International system,
"there is more cooperation than conflicts".

True.

Explanation:

This is because, the days of autocracy is over and there is a new era of democracy where each and everyone is allowed to speak out his or her opinion when it comes building up a government

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.