How did Dorothy day fight for others rights?

Dorothy Day was co-founder of a group of activists who published a newspaper while feeding, sheltering and living with the poor of New York City. The group and its paper were called The Catholic Worker and it set forth a radical Christian vision of a world made more humane through active love, sacrifice, personal freedom, pacifism and resistance of what they saw as the dehumanizing features of capitalism and nationalism.

She showed people love who may not have been shown it before. This changed many people's lives, therefore it can change the world too :)