The worlds population is growing and is overpopulating. This is negatively affecting the worlds biodiversity.
For Dictatorship, the second answer is incomplete, a dictator may obtain power not only through elections but by a military or institutional coup d'état, a civil war or a military intervention by a foreign power.
In a republic, power is held by those citizens that are able and government is a public matter (res publica in latin) to vote and the power comes from their vote during elections.
The counterculture in the United States was formed as a stance against conventional social norms at the time. The values imposed during this movement heavily opposed the established mainstream culture. As it lasted from 1964 to 1972, it coincided with the involvement of the United States in the Vietnam War - where counterculture immediately rejected the initial widespread support over this involvement.
Correct answer: protests against the Vietnam War
