Kathe Kollwitz .

Kollwitzs work could be described as socialist propaganda, but as Carl Ziggrosser points out in his book on the artist, propaganda will only endure as art ,if the artist speaks purely in terms of his or hers art,if their allegiance is not to party but to humanity, if the issues are the eternal verities of death,suffering,love and children.It will be a work of art only if it's appeal is timeless and universal.Emotions are timeless and do not change,humans are of infinite shadings and varieties.No one can give a complete picture of all or even one category.Kollwitz dealt with them in terms of function  eg motherhood ,peasant etc.