The counterculture is mainly driven by the youth culture, because

they are most dissatisfied with the world they are inheriting

Explanation:

Generally, the youth might actually want to make changes because they don't like what is being handled to them. Specially when they feel like everything is a mess, or unfair in any way, they will most likely rebel. Adding it to the naturally rebellious behavior of youngsters, you have a pretty good idea of why they're generally responsible for counterculture.

increased food supply

improved public health

increased birth rates

hope this : d

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.