It is a narrative that serves as a metaphor
Answer: The right answers are World War I, World War II and the Cold War.
Explanation: Just to elaborate a little on the answer, it can be added that the Vietnam War (1955-1975) must be excluded from the list, since it was fought between South Vietnam and its ally, the United States, and North Vietnam, although a few other countries were also involved. World War I (1914-1918) and World War II (1939-1945) did affect the whole world, even though the former initially only involved Serbia and Austria-Hungary and the latter originally only confronted Germany with France and the United Kingdom. As per the Cold War (1947-1991), it was a conflict primarily between the United States and the Soviet Union, and their respective allies, but it eventually permeated the while world. Many colonial regimes fell as a result of this worldwide conflict. In her poem, poet Muriel Rukeyser (1913-1980) is stressing that she lived in the first century that witnessed the emergence of those worldwide and devastating conflicts and that, in spite of the horror, she hopes for a better future.
Which scene in the park? The one we’re they killed the soc or the rumble?
It an Adverb. I'm just writing because it has to be 20 characters LOL!