Conversation so far:
What does Dorothy Day's all men are brothers mean?
Dorothy Day insisted that the belief that all men are brothers required the Catholic to find the humanity in everyone without exception.
What was Dorothy Day's biggest accomplishment?
Dorothy Day's conversion as a political radical is described in her autobiography, The Long Loneliness. Day was also an active journalist, and described her social activism in her writings.
What else did Dorothy Day write besides her autobiography The Long Loneliness?
As part of the Catholic Worker Movement, Dorothy Day co-founded the Catholic Worker newspaper in 1933, and served as its editor from 1933 until her death in 1980.

Question: what is the most important fact in this article?
Self-contained rewrite: What is the most important fact about Dorothy Day and her Catholic Worker newspaper?