The correct answer is the United Nations. As of now however, there are 193 countries, which is a lot more than in 1945 when there were 51 member states. The territory in New York where the headquarters are are considered to be international territory. It is the most famous international organization in the world.
Capitalist who made his fortune in oil and founded the nation's first trust in the form of the <em>Standard Oil Company</em>. business started by John D. Rockefeller that was the United States' first trust.
I hope this is correct and helps!