What are some of the biggest events in history that affected the whole world?

start if world war 2

Explanation:

It affected so many countries all over the world.

first paragraph (and busy all the night ,with a silence deep and white )

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.