What is the fine-grained topic of the following text: Previous US targets included Socialist presidential candidate Eugene Debs, Industrial Workers of the World (IWW) founder Bill Haywood, social justice advocate Emma Goldman, journalist/author/socialist activist John Reed, political activist Max Eastman, civil rights leader Philip Randolph, Social Democratic Party of America and its successor Socialist Party of America co-founder Victor Berger, human rights lawyer Lynne Stewart, among others. Only return the topic.
US monitoring of socialist and social justice figures