How did the Citizens United law reached the Supreme Court?

On January 21, 2010, the court issued a 5–4 decision in favor of Citizens United that struck down the BCRA's restrictions on independent expenditures from corporate treasures as violations of the First Amendment.

Explanation:

the right answer is the end of world war ii

after the end of a global wwii all the nations involved, in an attempt to create an organization to maintain world peace. this agreement would work settling international disputes via negotiation and arbitration instead of leading the issues escalate to another war.