Which popular song had a profound social effect and was used to raise funds for famine victims?

Okay so someone decided to delete my answer. My said answer was "We Are The World". I don't even know what my mistake was. The song was used to encourage others to share their goods with those who are less fortunate, and cannot afford as much.

We Are the World for Plato users

The linear perspective changed the quality of art because it gave art a sense of reality. it gave the illusion that the background and surroundings were actually close and/or far and a sense of depth. linear perspective change the quality of art following its birth the renaissance period as they want the art to be more realistic and they believe one way to achieve it is to use the method of linear perspective. it uses the principle of math to realistically portray space and depth in art.