I believe it because they give people a sense of belonging to a certain community.
Rather than tied solely to religious aspects, Judaism followers treated each other like they're belonged to a close family (they are taught a similar culture, way of life, way to behave, etc.)
This type of sense belonging was really powerful since humans are naturally created to work as a group rather than following individualistic pattern.
He became a leader in the abolitionist movement, which sought to end the practice of slavery, before and during the Civil War. After that conflict and the Emancipation Proclamation of 1862, he continued to push for equality and human rights until his death in 1895.
