How does Lewis Hines and Jacob Riis work different from August Sander?

Lewis Hine and Jacob Riis focused on social reform through documentary Photography, highlighting the plight of immigrants and laborers to advocate for better living conditions and child labor laws. Their work often aimed to evoke empathy and drive social change. In contrast, August Sander's approach was more varied, emphasizing a systematic study of German society through portraiture, often categorizing individuals based on their professions and social classes. While Riis and Hine were activists using photography for social justice, Sander's work was more about documentation and artistic representation of the human condition.